Delays this morning (08/02/18) - part suspension

Perhaps it was the service from Stratford that was being reversed in the Green Park area, preventing trains from further north running through?

A60stock, The service disruption you experienced this morning was due to a signal failure at Wembley Park resulting in the suspension of the services between Neasden and Stanmore although Willesden Green would have acted as a tandem terminus to short trip delayed services too. The Jubilee line runs a very frequent service in the peaks and so any disruption will stack up trains in a number of minutes requiring line controllers to halt both sides of the service in order to prevent a rapid stack of services and keep trains carrying peak time crush loads held in the platforms for obvious reasons.

Another example of how high frequency disruption is dealt with on the Tube is the Victoria line which at peak times famously has more trains than it has platforms to accommodate them and so as soon as the line experiences major dirupton the first course of action is to send 4-6 trains back to the depot as an immediate measure before more drastic measures such as holding the service may be considered.

Obviously this is all dependant on the lines service frequency and actual location of the disruption and the resultant service pattern available to controllers but the higher the service frequency the less time it will take for services to stack up in disruption and so must be stopped faster. It's not uncommon to see Jubilee services short tripped at Green Park and running empty to reverse at Charing Cross either to correct an unbalanced service or to shuffle services around in order to recover lost time both of which would have happened due to this mornings disruption.

I don't mean to be a pedant here but what the driver relayed over the PA is technically true as the reversal point itself is Charing Cross whilst the train itself would empty at Green Park which isn't a reversing point just a de-training one.

Yep, I got caught up in this at the other end of the line (Stratford travelling to London Bridge). As you say, there were more trains being taken out of service and sent to Stratford Market Depot from Stratford than in service units departing Stratford.

Yes, exactly my point, saying trains are reversing at charing cross would confuse someone who isn't aware the jubilee line used to go there.

Why cant trains run to CX in service? (Infact, why was it not kept as a branch)

well not true - i believe there was speical event while ago - trains serviced the CX for speical event - i beileve its was tube flim night - the escalators used as stairways however i agree the CX should used as emergency detraining example few trains go to CX to tip out the passegners in event of emergency

its still useable in fliming as well - sometimes trains are serving CX for fliming as well with passegeners in it

The events you describe are not part of normal passenger services. So Chris is right - Charing Cross has never been served by trains in regular passenger service since the extension opened in 1999.

I’m not sure if a passenger train ever got sent there by mistake though. Had that been the case, the passengers would have remained on the train until it returned to Green Park.