UK travel agent for rail bookings?
 

Start by giving us a clue as to what sort of journey your uncle is trying to make - when you say UK travel agent, it's making things a touch misleading as to what you're after

Booking trains in Europe is one of the less convoluted and time-consuming things you can do, provided the trains are available to book online.

Anyone with a computer who has done it before will be able to help him.

The value of a physical travel agent (for which he may have to pay dearly) would be helping him decide where to go and finding out what train routes exist. Railbookers.co.uk is one such service but this appears to be by phone only.

There are some good suggestions from The Man in Seat 61 here:

https://www.seat61.com/Europe-train-...s-by-phone.htm

It sounds like Ffestiniog Travel would be a good place to start., since he wants the services of a travel agent, rather than just a ticket booking service.

I used the Swiss Travel Centre in Bedford Street last year. I flew into Geneva, but exited to Milan and they were able to book that trip for me. They found me a deal on a Swiss Pass that wasn't obvious from the website, plus I got them to select hotels for me. Normally I'd book things myself, but as some journeys weren't available for sale (ie not 3 months out) they were able to automate it and get the journeys I wanted, including some really touristy trains. I looked at the cost of the pass, the hotels and the supplements, and the premium for using them was still cheaper than my time trying to stress out about getting seats when the booking period opened.

Of course, not much good to you if you're uncle doesn't want to go via Switzerland!