Have just returned from a few days off with the family in Majorca, and while there was not much time for collecting, a few specimens did slip into my case somehow. We were in the north at Alcudia. Since the geology is fairly dry and sandy it was a good spot for Hymenoptera, with lots of solitary wasps. Most of them needed a net for capture (alas I didn't pack one) but one day this large wasp flew into the room through an open window, which was hurriedly closed, trapping him inside. This is the first picture, the wingspan is 31 mm.
The second picture is a Tenebrionid beetle that I found under a discarded plank. I've seen similar specimens brought back from Greece but I don't think this genus occurs in the UK, so no luck in placing it yet.
The final picture is a firebug that I dug out of a spider's web, recently captured and bound with silk, but not yet sucked dry. He cleaned up fairly well and the spider can always find another.
Other sightings included at least 3 species of dragonflies and damselflies, a large hoverfly, probably Volucella, and Long-tailed Blue.
Nice finds Clive. The wasp looks a little like a Sceliphron caementarium ssp. suicideii. The trouble with these is, as you found, if they do sneak into your case they will commit hara-kiri with the nearest implement!
When I get a chance, I'll post some piccies of various mud cells and even a short video of one emerging that I was lucky enough to capture in France.