I have long been an advocate of providing FIS using radar as per ICAO Doc 4444 para 8.11 (which contrary to whowhenwhy's opinion is quite clear in my opinion) as I understand they do in France and some other European countries.
When 'workshops' were being held during 2007 to discuss the replacement of FIS/RIS/RAS, I attended one and tried to suggest the UK provide services as per the above but my suggestion fell on deaf ears.