72 Stock to Serve Until 2030's

In regards to the refresh, I'm surprised the poles have remained brown, and the seat covers have been given a unique colouring... I thought the idea was that all Deep Level lines were to look the same from now on, hence why the Northern line refurb looks like a Vic-Pic hybrid! ??

First unit to be refurbished is 3267-4267-4367-3367 Mark I Stock. As per the YouTube video.

If you look closely, the image shown in the Standard with the grey colour scheme and new lighting is a 3D Mock-up photograph edit. Currently, no units have received the grey colour scheme as shown in many other photographs. 

The mark 1 units are having their Reavell compressors replaced with Westinghouse 3HC43 types. There are plenty of spare from the C And D stock. This marks the end of the Reavell TBC38Z in passenger service that first came into use on the A62 stock.

In those days they outstabled at Ricky & Uxbridge off peak.

Travelled on a refurb the other day and I have to say it's a bit disappointing: new flooring, new upholstery, and badly repainted poles where the paint is scratching away already. Everything else still looking scuffed, worn out and filthy, including the wooden inserts at the end of the seats. Is that it or is there more to do?

That's because the refurbishment consists of an exterior and underfloor overhaul, the interiors are given a refresh to a similar degree as the 92TS refresh with exception of new flooring.
However, aside from the seating and flooring, some panels and doors are covered with white sticky wallpaper as well. The grab poles are not being repainted.
At the end of the day, interior cosmetic repair on trains that will have only several years left in service would be deemed wasteful or at least cost monies which can be allocated elsewhere. As long as the seats are clean and the floors are not a trip hazard, passengers will be happy.

Looked like a 72 stock has been in Ealing Common for the last couple of days it's on the "alps" so couldn't confirm unit numbers

Interesting article in The Rail Engineer about the life extension work:

www.railengineer.uk/2016/07/27/london-underground-train-life-extension/

The article mentions 1972 stock crossing the Forth Railway Bridge. Are there any photos?

Taken from the article; They last had major work in the mid-1990s when they were refurbished – an extensive visual modernisation whilst eliminating materials that were a fire hazard. For this work they were hauled over the National Rail network to the dockyard at Rosyth, which included travelling over the historic Forth Bridge

The trains really did travel over the Forth Bridge. The original plan was that the trains would be refurbished by a consortium of Tickford and Vic Berry in a workshop adjacent to the Midland main line at Leicester. The Vic Berry organisation went bankrupt. At the time, Babcock had the management contract to run the dockyard at Rosyth and wanted to diversify. They were connected to the rail network and had sheds with track within. They proved to be the solution to an unexpected problem.

Tickford were a successful offshoot of Aston Martin so somewhat above the likes of Vic Berry.

Agreed, I love how they feel like they are tugging when they depart!