Piccadilly Line New Stock Jul 18, 2010 21:53:16 GMT
Post by Chris M on Jul 18, 2010 21:53:16 GMT
(Posted on the Met line board, but most likely meant to be posted here).
I've seen it said often on here that the City of London Corporation paid some of the cost towards the 1992 stock for the W&C and so their permission (and presumably some financial recompense) would be needed to replace them and I can't see that being an easy sell if the replacement trains are to be older than the 1992 stocks.
Also, having recently spent a large amount of money on a full refurb for the W&C 1992s I don't imagine TfL being eager to put their hands in their pockets to do the same for some 1972s. I suspect they'd demand (close to) 100% funding from SWT/DfT, including the considerable logistics costs in exchanging a fleet of trains via crane.
Then factor in the training time and costs so the Central Line t/ops can learn the second stock. And you've got to train (and possibly retool) the maintenance folk as wel - more money from the Island Line purse.
Then remember that this isn't a simple cascade from one LU line to another, and TfL will get no benefit from the units on the IOW. The purchase price will be higher as these aren't surplus stock that LU would otherwise just get scrap value for.
Now factor in that the 1972s you've put on the drain will need replacing around 20 years before the 1992s would have done (assuming a similar lifespan), so add in some compensation to TfL for those 20 years. Although this will be offset by the 1992s lasting longer on the Island than the 1972s, the trains will probably have a harder working life on the island than on the W&C (7 days a week for starters), exposure to the elements - including all the salt in the air between Ryde Esplanade and the pier head. Take into consideration what you know about the build quality of the 1992 stock on the Central Line, would you bet on the 1992s retiring 20 years later than the 1972s? I wouldn't.
All told I think this is less likely than any of the options I suggested (other than new bespoke stock).