On Apr 19, 10:50*pm, "Paul Scott"
wrote:

If trains on the national network need yellow front panels why doesn't the
same apply to LUL?

It has been suggested previously it is because LU do not normally allow
maintenance staff access to the live railway.

LU does allow access but only for emergency faults. No routine
maintenance on track is done in Traffic Hours.


You may have noticed LU's battery maintenance locos do have yellow panels....


Chickens and eggs? The choice of yellow may have been influenced by
the need to operate over NR tracks, and not just the obvious tube
routes, but occasionally, in the past, on other jobs.

--
Nick