An update.
Coupled with advice I received on the "bad temper" thread, we started asking around for test frames - as we have only one hive. Despite apparent good intentions on the part of several beeks in the region, a test frame wasn't forthcoming. One thing that one beek said was give it at least 3 - 4 weeks before you are sure your hive is queenless.
We were all set to follow MJBees recommendation of a new queen from
"l'abeille d'auvergne" but other stuff gained priority so didn't get around to it.
Last week, we finally made contact with a local beek who has been somewhat elusive and he and his wife have turned out to be very helpful and knowledgeable and they went through the hive with OH.
We appear to have a new queen (didn't find her though) who is laying in a beautiful, consistent pattern straight across the frames. The bees are calmer and no where near as aggressive, very little bumping going on. Two supers of good honey stocks which we'll harvest in a week or so. We think they swarmed about 4 weeks ago - there just seemed fewer bees - but now the hive is chock full again. Our new best beekeeper friend said well done,
belle colonie d'abeilles and he'd call us in a couple of weeks to see how we're getting on. He also commented that the spot we'd chosen for the bees was excellent but that he recommended we change the orientation from east to south-westish which we can do.
The whole beekeeping thing seems possible again.
We will probably buy a swarm off him as that gives us double the worry
but at least puts us more in control of our own destiny if we need test frames etc and anyway, we did always have in mind to have three hives eventually.
One thing we've done at his recommendation that doesn't feel entirely right - but on the basis that at the moment we want to be friends so we've gone along with it - is we have removed the queen excluder as he doesn't believe in them and thinks it reduces the likelihood of swarming. Yes, you'll get "bits" in the honey but it needs to be strained anyway so... gallic shrug...
Thanks to everyone here who gave us advice and support. It's been appreciated.