I suggest you limit it to Great Britain as Northern Ireland is a different network. It would also be an idea to need to provide an ELR also as stations can have the same mileage.Don't know if this will work, PM if your intrested.
I'll start with a mileage of a station, anywhere in uk and you have to guess it.
No other clues than just the mileage.
For example if i said 158m 3 ch
That was a good 1 Taunton?Crewe
163 M 12 Ch MLN1.
Correct.That was a good 1 Taunton?