According to the UK IAIP Thames Radar should be open 0600L-2230L. Its hours are not inextricably linked to London City opening hours. Thames has other responsibilities such as providing Biggin APS, and covering (cross-coupling) the 'SVFR' desk for Heathrow at breakfast-time and cocoa-time. Otherwise in 1987 it would have been christened as only 'City' Radar instead. (Now that would have stopped people calling for LARS at Lechlade…)
What is the SVFR position going to be known as as from today? 'Heathrow VFR'? 'Heathrow Not-So-Special'?