...though you will have the UK IMC rating (if you have a CAA/JAA licence) so if you're flying in the UK in uncontrolled airspace you can use your IR head, but as soon as you enter a class D zone, then you must switch the IMC head on.....Unless you change the shape of the letter on the aircraft from this: G to this: N then you're quite entitled to use your IR head 100% of the time...(confused?)
Cheers
EA