The quadrantal rule is an IFR procedure flown on standard pressure and not a VFR procedure! There is nothing to stop you flying QNH OCAS VFR at 6000 feet
Not wishing to step on your toes, but why does the reverse side of the Geppesen VFR Chart 2012 (EG5) say:
United Kingdom
VFR Cruising Levels
Flight Levels below 19500
Magnetic Track Cruising Level in Feet
000 - 089 odd thousands
090 - 179 odd thousands plus 500
180 - 269 even thousands
270 - 359 even thousands plus 500
Am I missing something? In spring I wanted to do a tour of UK, so this is something I would like to clarify.....