I've sold the BMC now, and gone for a Jetex cone filter. Easy enough to do, just bung it on the maf.
As J0n has done, I also used a silicon coupler to push the filter further out from the engine bay and closer into the wing. Its only on a temporary clip at the moment:
You can certainly hear the engine sucking the air in when reving it with the bonnet open!
I also changed the pipe going from the engine to the boost gauge.
I thought instead of farting around trying to squeeze my hand under the windscreen wiper again, i would remove the tray covering gromits:
This made getting it through the gromit considerably easier. Also made it a hell of a lot easier to silicon seal it. Only the old pipe in place on the photo but you get the idea:
I ran the new pipe along the covered area under the windscreen, and out into the trunking that runs under and behind the standard air box to the battery. You can see the pipe attached to the maf and filter in an above pic. Keeps it nicely out the way and avoids all hot pipes