Hi All...
As you may have guessed, I am not so versed in the daily intricacies of railway life - as much as I like trains, and, dare I say it, "playing" trains, I am not a railway enthusiast as such, and, therefore, have not spent much time around 1:1 railways or really delved into the ins and outs of railway operation. I should do more research really ! I have been messing about with model railways for the last 35 years, but only really from a modellers point of view, modelling the bits I want to model !
@ The Johnster......
Thank you for your very comprehensive reply, I have ( I think ) always been aware that there were specific lamp locations for certain train types/classes, but I was not aware that it was so complex ! I can see the issue with having too many lamps or the wrong combination fitted - maybe I could get away with claiming that the dirty great 9F pulling 1/2 a mile of coal whilst displaying 4 lamps to the front was delivering coal to the Royal Household !
Modern LED technology is such that both a red and yellow/white LED could be built into one side of a 00 lamp with a white on the other - providing you have the eyesight, steady hand and a soldering iron with a 0.10mm tip !
Maybe a more practical way to produce removable working lamps would be to take a cue from vitalspark's post about small pins in the bottom of the lamps fitting into small holes drilled in the loco body - only you would need two holes (+ve &-ve, obviously) - the issue would be finding suitably small sockets to mount flush into the body, the legs on the LED itself could be used as the pins .
Hmm....... now my brain is ticking - I'll get no sleep tonight pondering this one !