When I was a guard at Brighton in the mid-1980 I checked the tickets of many celebrities, including Dora Bryan, Oliver Read (polite and charming), Alex "Hurricane" Higgins (drunk, rude and arrogant), Carol Barnes, Christopher Timothy, Annie Nightingale....to name a few.
In 1998 (I think), my wife and I met and had a brief chat with Michael Palin on the platform at Coleraine station in Northern Ireland, while he was filming his Great Rail Journeys series. Then a few days later, we saw the late John Hume MP on the concourse at Dublin Connolly.
When I was a driver at Skipton in the 1990s/2000s I met Thelma Barlow and the late Peter Baldwin - who played Mavis and Derek Wilton in Coronation Street - on Skipton station one Summer evening. Both were charming and very willing to chat. One morning in 2004 I met Pete Waterman when he alighted from the cab of a class 37 at Skipton on the Leeds-Carlisle loco-hauled service. He got into a car to take him to the Embsay Steam Railway. A few years later Una Stubbs and her companion alighted from my class 333 unit at Bradford Forster Square on arrival from Leeds. She was very pleasant and chatted with me and my guard, who phoned for a taxi to take her to the Alhambra Theatre.
In the Autumn of 2000 I spent a week down in London driving Heathrow Express 332s backwards and forwards between Paddington and the airport as part of our practical handling training for the introduction of the class 333s in Yorkshire. On one trip back from Heathrow, we had Princesses Beatrice and Eugenie riding in the rear car. The HEx staff messroom at Paddington had a 'Celebrities' whiteboard on the wall, where you could write the names of those who you had seen each week.
In a non-railway setting, I have met the late Queen Mother - who apologised for arriving late at the function and asked me if I had had my tea yet - the late Donald Dewar MP, first First Minister of Scotland, Paddy Moloney and Derek Bell from the Chieftains in a Dublin Pub, the late Eric Sykes in a South London park and opera singer Lesley Garrett in Bradford (very friendly, chatty and completely down-to-earth....as befits the daughter of a railwayman!).
Also, I was interviewed by Anna Ford in the Yorkshire TV studios in Leeds at the launch of a Railtrack video anti-trespass video in about 1994. They wanted to hear from drivers who had either run over or had near-misses with children on the line.