Served by Chiltern Trains to commemorate the last day of the Class 121 "Bubble Car" DMUs on 19th May. As you can see, it's a pretty creditable model:
The first slices of the cake were cut by Chiltern MD Dave Penny:
And then served up to those who had made the trip to a damp Princess Risborough station to witness the final running of these venerable machines on the national rail network.
Your corespondent had to taste the cake of course and can report it was a particularly delicious chocolate:
No I didn't save you any...