[class700]

There's also OpenTrainTimes https://www.opentraintimes.com/maps/signalling/wat#T_WATRLMN

And https://www.realtimetrains.co.uk/ for precise times/platform information.

[marksomnian]

And https://www.map.signalbox.io/, which tries to interpolate signal locations onto a geographic map (with the expected level of inaccuracy, though still not half-bad)