Asmgcs
Many airports in the UK that have low visibility operations have surface/ground surveillance (usually radar) as well as centreline lighting, stopbars and runway incursion alarms.
However, it is not mandatory to have surveillance for low visibility operations. Remember, you can do low visibility departures without CAT III instrument landing systems etc.
Each airline has to audit the airport prior to carrying out low visibilty operations, but it is not always done.
There are problems with some of the runway incursion systems, but one seems to work well, provided that you tune the system and do not have significant multipath effects.
The ATC procedures/airport operator's procedures are not, in my opinion, adequate to make the runway incursion alarms as worthwhile as people think.