Kings Cross signalling (OJ signalling area)

Hey all

Basically, ive been intrigued for a while by the Kings Cross approach on the Inner Circle, especially since my commute takes me over this stretch of track on a daily basis but also because im trying to chronicle the SSL signals and their approximate function before their eventual removal (hence why most of my questions on signalling relate to signals on the SSL).
I have a few questions related to the approach:

1) How many home signals does the Inner Circle approach have and how are they numbered (including any repeaters)? 
2) Are any of them speed controlled signals and if so which? (Ive always assumed at least the first two signals are speed controlled)
3) Which of the home signals does the Repeater in advance of A210 repeat?
4) How has the removal of the Outer Circle to Inner Circle crossover affected the interlocking of the signals, as in, before the removal of the points, if a train was reversing East to West and a train was approaching along the Inner Circle, where would the train on the Inner Circle have been held? (Also what was the old shunt signals' number?)

This is quite detailed, I know, but ive always tried to catch a glimpse of them from my train and note them down and have never quite been able to see them (I think most of them are in the 6ft way), which is a bit of a bummer since especially in the peaks, they really provide a great working example of a long sequence of Multi-Home signals doing their job properly.

Any help would be appreciated!

(Ps, since the introduction of the new crossover between Euston Square and Kings Cross, I could ask a similar question for trains approaching Kings Cross on the Outer Circle, but i'll refrain from that for now )