Winner:
“Richard Summers collected a sample from everyone on the train” - submitted by Richard Johnson

Some of the best runners up were:

“OTC were not looking forward to the 4th return trip to carriage C as the annual outing of the Cheltenham WI was getting a little out of hand.”
- Neil James

“Well, I don't know about you guys but I'm sorted!!!”
- Lee Owen (and the virtually identical “That's me sorted, what are you drinking?” by Neil Carr)

“All drinks have been passed by the Management.”
- Anonymous

“And now for your final test to pass out as a steward in the restaurant car”
- Edwin Chappell

“.......and one tea, please.”
- Glyn Cornish