We stayed here in the end. It's very central (which makes actually driving to the hotel 'interesting') and elegant in a friendly, rather than pompous way.
Monday night (the day before our anniversary, but what the heck) we went to the Thermae Bath Spa. It's a little spendy, but really enjoyable - swimming under the stars in a warm pool, baking in scented steamrooms - all good stuff. Got us ready for dinner in probably the best Indian restaurant we've been to. Sleeping was difficult with such a full tum.
Tuesday we wandered round the old Roman baths. Been there before, but not for quite a long time, so it wasn't so bad. The pools are quite remarkable, if you don't mind archeology.
And so home last night.
It was the actual anniversary, and we took Ben out for a meal. He met friends there, and was more animated with their company than ours, but I guess that's how it goes. He did get us a winerack for the occasion (I had suggested Chris would appreciate a card - details, details) so we shouldn't be churlish.
But a good time away. Thankyou for your prayers for us.