Seri. Green Lacewings should be about during the day but they seem to be rather localised.
I hadn't seen any here previously but have found 3 recently without specifically looking for them. In each case, they were feeding on white Umbellifer flowers (I didn't note which species) on the edge of farmland.
Mike's shieldbug reminds me of a boating blazer worn by Edwardian gentlemen. But I can't find an identification from my UK sources. This site has a lot of information http://www.britishbugs.org.uk/galler...atomoidea.html
His 'bee' does seem a big bright for Volucella zonaria but on the Hoverfly Recording Scheme site I was recently confused by a similar looking specimen which turned out to be a newly emerged V. zonaria; hence the extra brightness. So I would suspect that your suggestion is correct.
ps. We are certainly seeing some excellent images of a wide range of species in this thread.