Alright, I can't resist, so let's go through this line-by-line. Apologies if I miss any. Also 'scuse the formatting. Many of the interactions between lines can be complex. Sometimes it's as easy as northbound Bakerloo to northbound Jubilee and southbound Jubilee to southbound Bakerloo at Baker Street. Sometimes it requires a whole essay as at Willesden Junction. Sometimes there's clearly an x to y. Sometimes it's simply merging. It's merging in one direction, but diverging in the other, so it's not so easy to explain. At Aldgate for example, I simply describe it from the point of view of approaching from Liverpool Street. Obviously it's all the other way around if you're approaching from Aldgate East or Tower Hill and it's different again if you happen to be the Metropolitan line starting at Aldgate.
In reality, of course, the Circle, District, Hammersmith & City and Metropolitan lines are the Sub-Surface Railway. Hardly worth trying to tease them apart in this context.
Also, between Barons Court and Acton Town, the fast and local lines may - more or less - both be used by District and Piccadilly line trains. But here's something anyway. You may just wanna skip to the end, but the summary is very summarised.
Bakerloo line.
At Harrow & Wealdstone, the London Overground (Watford DC line) leaves the Bakerloo line and continues on to Headstone Lane and, from there, to Watford Junction. This is a very simple state of affairs. The London Overground and Bakerloo line share tracks as far as Harrow & Wealdstone. The London Overground then simply continues on, with Bakerloo line trains reversing via a central reversing siding to the north, or a trailing crossover to the south. The fourth rail runs out on the down DC lines at the same point that the reversing siding ends; it begins on the up DC lines where the points leading from the siding converge with the up line.
Just to the south of Willesden Junction is Willesden TMD (Traction Maintenance Depot) used by London Overground trains. Trains from the TMD join the Bakerloo line/London Overground just to the south of Willesden Junction. There are also two connections from the TMD to the West Coast Main Line. To the south of Willesden Junction there is also a connection to the North London Line via the "New Lines". Trains may proceed towards Kensal Rise, or reverse in Kensal Green turnout. From here it is possible to head down towards Willesden Junction High Level and from there along the North London Line towards Acton Central or towards Mitre Bridge Junction and onto the West London Line towards Shepherd's Bush. The West Coast Main Line joins the West London Line at Mitre Bridge Junction. Additionally, the City Lines (which branch of off the West Coast Main Line) also join the North London Line at Kensal Green Junction and it is possible for trains from Willesden Junction to gain the West Coast Mainline by reversing in Kensal Green Turnout. Please see the carto metro map for more.
To the north of Queen's Park, the London Overground leaves the Bakerloo line and heads for its own platforms at Queen's Park. The Bakerloo line uses the two inner platforms at Queen's Park and the London Overground uses the two outer platforms. The junction between the two, called Queen's Park Junction, is just to the north of the train sheds. London Overground trains cannot use the Bakerloo line platforms at Queen's Park. However, southbound Bakerloo line trains may be routed into the up London Overground platform. From Queen's Park, London Overground trains head towards Kilburn High Road.
At Kilburn High Road, it is possible for the Bakerloo line trains which were routed into the London Overground platforms at Queen's Park to reverse south to north via a trailing crossover to the north of the station. They may then return to the down London Overground platform at Queen's Park and regain the Bakerloo line at Queen's Park Junction. The fourth rail, however, runs out at the end of the up platform at Kilburn High Road. Here, London Overground trains leave the Bakerloo line for good. They then proceed towards South Hampstead and then to Euston.
At Baker Street, there is a connection between the northbound Bakerloo and the northbound Jubilee to the north of the station. Similarly, there is also a connection from the southbound Jubilee to the southbound Bakerloo to the south of the station.
Central line.At West Ruislip there is a connection to the Chiltern Main Line. Number 27 road of Ruislip depot leads to West Ruislip down siding on the Chiltern Main Line. From here trains may head into the down platform at West Ruislip. From here, trains may either go back in the other direction, along the down line towards Denham, or they can continue in the up direction, along the down line, towards South Ruislip and from there to Greenford West Junction.
Ruislip depot also connects to the Piccadilly and Metropolitan lines via a siding located between Ickenham and Ruislip.
At Epping, the connection to the Epping Ongar Railway still exists. The track simply continues on east, beyond Epping.
Circle line.
Obviously, at Praed Street Junction, the Circle and District lines from High Street Kensington join the Circle and Hammersmith & City lines from Hammersmith. I dunno if you wanna think of this as the District "joining" the Hammersmith & City. Certainly, at Edgware Road, the District is then left behind by the Circle and Hammersmith & City lines, which continue on towards Baker Street.
At Baker Street, of course, the Metropolitan line then joins the Circle and Hammersmith & City lines.
At Aldgate, the Hammersmith & City line diverges and heads off towards Aldgate East. The Metropolitan is also left behind, while the Circle line continues on to Minories Junction and joins the District line for the run to Tower Hill.
Between South Kensington and Gloucester Road, the Circle line branches off from the District line to serve its own platform (which may be served by District line trains, but Circle line trains must not accept the route into the District line platform). The Circle line then leaves the District at Gloucester Road, only to rejoin it at High Street Kensington for the run up to Edgware Road.
District line.
Obviously, at Hanger Lane Junction (between Ealing Common and Ealing Broadway), the Piccadilly line heads off to North Ealing.
At Acton Town there is lots of fun to be had with a general merger of all lines. The eastbound local platform at Acton Town may be used by the District line from Ealing Common and Ealing Common Depot and the Piccadilly line from Ealing Common and South Ealing (fast and local) and it may be used by trains from the reversing siding between the fast Piccadilly lines. The eastbound fast platform may be used by the District line from Ealing Common and Ealing Common Depot and the Piccadilly line from Ealing Common and South Ealing (fast only) and it may be used by trains from the reversing siding between the fast Piccadilly lines.
The westbound fast platform may be used by trains from all three sidings to the east. It may also be used by trains from the fast (generally Piccadilly) line. The westbound local platform may be used by trains from number 21 siding only, the fast (generally Piccadilly) and local (generally District) lines and trains from Acton Works.
From the eastbound local platform, trains may head to Ealing Common Depot, all three sidings to the east, along the local (generall District line) to Chiswick Park and along the fast (generally Piccadilly line) towards Turnham Green. From the eastbound fast platform, trains may head to Ealing Common Depot, all three sidings to the east and along the fast (generally Piccadilly line) towards Turnham Green.
From the westbound fast platform, trains may head to all three sidings to the east, the siding to the west, Ealing Common and South Ealing (fast only).
From the westbound local platform, trains may head to number 21 siding only, Ealing Common and South Ealing (local only).
At Richmond, there is a connection to Network Rail from London Overground's platform 3.
At Gunnersbury, the London Overground (North London Line) leaves the District to head to South Acton at Gunnersbury Junction to the east of the station. The fourth rail runs out not far after the junction.
At Hammersmith and Barons Court we have more mixing.
From the eastbound local (generally District line) platform at Hammersmith, it is possible to head along the local to Barons Court (District line) or along the fast to Barons Court (Piccadilly line). From the eastbound fast (generally Piccadilly line) platform at Hammersmith, it is possible to head along the local to Barons Court (District line) or along the fast to Barons Court (Piccadilly line). It is also possible to head into the reversing siding.
From the westbound Piccadilly line platform at Barons Court, it is possible to cross over onto the westbound local (generally District line) just to the east of Hammersmith. It is also possible to enter the reversing siding.
From the westbound District line platform at Barons Court, it is possible to cross over onto the westbound fast (generally Piccadilly line). From there it is possible to head to Hammersmith's fast (Piccadilly line) platform, or back onto the westbound local, or into the reversing siding, which also allows access to the eastbound fast (Piccadilly line) platform.
At East Putney, the District line is joined by Network Rail tracks from Point Pleasant Junction.
At Wimbledon Park there are then two connections to Wimbledon Park National Rail depot.
There is also a further connection with Wimbledon Park depot just to the North of Wimbledon station and then another connection with Network Rail at Wimbledon North Junction.
At Minories Junction, just to the east of Tower Hill, the Circle line branches off to Aldgate. The District line then continues to Aldgate East Junction, where the Hammersmith & City line joins and both lines head into Aldgate East station.
At Barking, the Hammersmith & City line has run its course and gets left behind. There is also a connection to London Overground's GOBLIN just to the west of Barking's platform 1a.
Hammersmith & City line.
See above.
Jubilee line.
At Wembley Park, there is a connection from the southbound Jubilee to the southbound Metropolitan. Neasden depot also provides a means of getting between lines.
At Neasden there is certainly a connection to the north from the northbound Metropolitan to the northbound Jubilee. That looks like it's still in use, maybe, but TBTC has wreaked havoc, so I'm not sure how many of the numerous crossovers around Neasden allow for a straightforward cross from one line to the other. Certainly the depot, again, provides a means of getting between lines.
Metropolitan line.
At Amersham, the Chiltern line continues towards Great Missenden and Aylesbury, leaving the Met behind. Electrification runs out just beyond Amersham.
At Harrow-on-the-Hill, the Metropolitan line heads towards Northwick Park, while the Chiltern line heads towards Neasden South Junction, where it joins the Main Line and heads to Marylebone. Electrification runs out after platform 2 on the southbound and begins just to the south of Harrow-on-the-Hill on the northbound, where the Metropolitan line joins.
Obviously there is a junction with the Piccadilly line at Rayners Lane.
Northern line.
From the southbound Northern line platform at Euston (City branch) it is possible to head to King's Cross St. Pancras or to turn right into what is called the Euston loop. From this Euston Loop it is possible to then head along the northbound Northen line and turn right into what is called the King's Cross Loop. From here, one may gain the northbound Piccadilly line and head on to King's Cross St. Pancras on the Piccadilly line.
Piccadilly line.
Northbound Piccadilly to northbound Victoria and southbound Victoria to southbound Piccadilly at Finsbury Park.
A summary (I assume you'd like one):
- Bakerloo and London Overground at Harrow & Wealdstone
- Bakerloo and London Overground at Willesden Junction
- Bakerloo and London Overground at Queen's Park and Kilburn High Road
- Northbound Bakerloo to northbound Jubilee and southbound Jubilee to southbound Bakerloo at Baker Street
- "Central line" and National Rail at West Ruislip
- "Central line" and Met/Picc at Ruislip Depot (connection between Ickenham and Ruislip)
- Central and Epping Ongar Railway at Epping
- District and Circle at High Street Kensington
- District and Circle from High Street Kensington join Circle and Hammersmith & City from Hammersmith at Praed Street Junction
- Circle and Hammersmith & City leave District at Edgware Road
- Met joins Circle and Hammersmith & City at Baker Street
- Hammersmith & City leaves Circle and Met at Aldgate
- Circle leaves Met at Aldgate
- Circle joins District at Minories Junction
- Hammersmith & City joins District at Aldgate East Junction
- District and Circle at Gloucester Road
- District and Piccadilly at Hanger Lane Junction
- District and Piccadilly at Acton Town
- District and Piccadilly at Hammersmith and Barons Court
- District & London Overground and Network Rail at Richmond
- District and London Overground at Gunnersbury
- District and Network Rail at East Putney
- District and Network Rail at Wimbledon Park
- District and Network Rail at Wimbledon
- District and Hammersmith & City line at Barking
- District & Hammersmith & City and London Overground/Network Rail at Barking
- Jubilee and Metropolitan at Wembley Park
- Jubilee and Metropolitan at Neasden
- Metropolitan and Network Rail at Amersham
- Metropolitan and Network Rail at Harrow-on-the-Hill
- Metropolitan and Piccadilly at Rayners Lane
- Northern and Piccadilly at King's Cross St. Pancras
- Northbound Piccadilly to northbound Victoria and southbound Victoria to southbound Piccadilly at Finsbury Park.
Don't think I'm missing any.
