I haven't seen the MK3 around for a while. The MK4's are still being done, I think there is a set at Donny now being put into silver. The MK4's are also going to Donny for other general improvements to interiors to fix broken toilets, chairs etc etc etc and are being painted during this work.
I'm sure May was the deadline for all of this work, but a harsh winter at the start of 2010 and at the end of 2010 has meant there have been numerous other problem to attend to meaning taking a set out to get this work done was almost impossible. Hence the hired in sets from XC & EMT in the last year.