So, what else is available ?
Porterbrook have a list of lease end dates here which may be a couple of months out-of-date:
http://www.porterbrook.co.uk/pages/LeaseEndDates.htm
Most other lease expiry date will coincide with the current franchise end dates.
There's been guarantees on some classes that they will remain in the same area even beyond the end of the current franchise. The 333s and 379s have such guarantees. (In the case of the 333s it's only that they remain on services serving West Yorks not that they remain on the same lines.)
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Whilst there appears to be speculation that 158's will be poached from Northern
What's interesting is the 158s, 321/9s and 323s have had CCTV fitted which TfGM and Metro have funded* and a condition of that is that if the units are removed from their respective areas that replacement units will have CCTV fitted at no cost to the PTE from the outset. Apparently the ex-LM 150s have CCTV fitted but the systems aren't activated. I wonder what the cost would be of reactivating the systems on those units or if it'll be cheaper to fit new CCTV to other trains (if there's compatibility issues.)
* Obviously Metro funded the 321/9's CCTV and TfGM funded the 323's CCTV. Metro funded most of the 158's CCTV but TfGM funded the CCTV on 158s operating Victoria to Leeds services. The 333s have Metro funded CCTV as well but Metro have had a guarantee that those units will remain on West Yorkshire services in the long term.