Maybe that's what he needs to do (ring BHM). I had looked on the BHM parts site to see if they list a clutch kit, hoping to see whether the +4 and +8 kits matched, but they only list a +8 kit for a 4 speed box, and don't list the T16 kit at all as far as I can see.
It's not urgent but one of those jobs that will need doing in the not too distant future, so he's trying to research the options.
Thanks again
Malcolm