Ok, thanks. Sounds like most things that I assumed were outside scope should actually be reverse charge. I think I am more confused than ever. However whether something is 'reverse charge' or 'outside scope', as you importantly point out, doesn't change the vat due (which I think is the crucial aspect when dealing with hmrc). After all 'reverse charge' zeros out on the vat return in terms of vat amounts due while 'outside scope' doesn't appear on the return at all.