47827, I had a brilliant run in the mid-late 80’s, on a Holyhead-Euston relief, booked non stop Holyhead-Chester, was a 47/8, with mk2 non air con, I was at Holyhead, on an ALR, was 16-18 at the time, and was about to catch said relief train, i went up to engine and talked to the driver, and asked bit cheekily if could have a cab ride, which the driver agreed to, so i hopped in the cab,and got ready for the non stop run to Chester, we left on time, and the driver straight away, set off with gusto, with speed soon getting above line speed, and reaching 99 mph, from speedo, all on Anglesey, before stopping in Bangor, through roads, due to trespassers spotted on Menai bridge, then set off again, with speeds soon up to 90mph, which we did a lot of the way to Chester.
The driver, was quite a character, and let me use the horn, he ran very hard all the way, getting up to 90mph and staying there, much as he could, despite running early, we had hell of a thrash, along the North Wales Coast, with some very lively running indeed, eventually arriving Chester 20 mins early where i bailed out the loco, and joined the carriages, for the run to Euston, unfortunately didnt record the loco, or any timings, as too excited, at having cab ride, was just a great run, and amazing having a long cab ride.