Put the rest of my bike back together, managing to strip the thread off the negative battery screw. Getgeared sorted me out a new one (FOC). Once all up and running had a cold run to Boro for a surprise Mother's Day visit.
ProfG, I didn't take any other pictures yesterday when the tank was off as my hands were covered in grime, but I'll have a look to see if I have any from a previous strip down.
Edit: one thing I can suggest is if you have one, get a flexible screwdriver (with PH1 head) and you can remove loosen the clip from the front boot without having to swing the radiator forward. (See pictures below)
The rest, loosen the Allen key from the rear boot, unplug all connectors from the rear of the airbox (one is screwed in), including the vacuum hoses from the two on the outside edge. It ought to lift off slightly. There's a clip underneath holding the breather hose on the bottom.
Edit 2: the pictures need rotating 90 degrees