Stewby and TCAS FAN
I would be very interested to know what radar is this fibre optic cable for?,there's been no info on any Watchman replacement!.
On the ILS point,there are many cat 1 airport's that operate with extensive operations i.e Cardiff,and with RNAV developing (02 on LPAV) Cat2/3 operations become less relevant ,so I would say that SOU could fulfill the requirements for LCC operations on the approach aids,but may be TCAS FAN can give his valid opinion on this.