Train passing red signal to enter sidings?

[bananas]

I've just seen 720553 apparently passing a red signal leaving platform 2 southbound at Bishop's Stortford, crossing the up line and entering the sidings. Is it standard to authorise trains entering that sidings to pass a red signal? How come? It's also possible I misread what line the signal is supposed to apply to. Photo shows the train as it began to accelerate out of the platform, before passing the signal.

 

[skyhigh]

You can't quite see it due to the position of a post on the platform, but there is a position light showing proceed to the left of the signal. You can just see the 'S' route indication showing.

Position lights are used to authorise shunt/permissive movements. The train hasn't passed a signal at danger.

 

[driver9000]

There appears to be a position light to the left of the main aspect which is obscured by the lamp post in your photograph.

 

[bananas]

Ah yes indeed there is. That clears that up then. I was looking at possibly the only angle on the platform where you can't see it!