Interesting. I recently tried to apply for a TfL veterans Oyster card, only to be told that a "veteran" requires proof of pension or other retirement payment. The national railcard asks for one day of service! The reason I looked into this was the threat from TfL to cancel London wide travel cards, which I'm sure many of you use. I wrote to TfL and J Mercer, Minister of Vet affairs pointing out the discrepancy, no joy. I understand TfL has rowed back on the travelcard decision, in the meantime I now have and Oyster card with my "Senior" discount added.
PS, this is my sixtieth year gainfully employed on flying machines, started as an LAC on Vulcans, lots of bits in between including BA Flt/eng, pilot, now FI/FE GA/Microlights. Still enjoy it but a recent engine frame change on a CTSW in a cold hangar reminded me of the downsides. Happy Christmas. JT