DB: Special VFR only applies in Class A airspace - in other classes it would apply in IMC or night.
See:
http://www.caa.co.uk/default.aspx?ca...90&pageid=2151
Here's the relevant bit. Great day wasn't it ?
6.3 Special VFR Flight
6.3.1 A Special VFR flight is a flight made in a Control Zone under circumstances which would normally require
the flight to be made under the Instrument Flight Rules (IFR) but is made under special conditions and with the
permission of ATC instead of under the full IFR.
6.3.2 The circumstances referred to in paragraph 6.3.1 are:
(i) At any time in a Class A Control Zone;
(ii) in IMC or at night in any other Control Zone.
6.3.3 The following conditions are applicable to all Special VFR flights:
(i) The pilot must obtain an ATC clearance and comply with ATC instructions;
(ii) the pilot must at all times remain clear of cloud and in sight of the surface;
(iii) the pilot must at all times remain in flight conditions which enable him to determine his flight path
and keep clear of obstacles;