Update from me.
So...
on the plus side (for all the pizza/potnoodle naysayers) turns out he pulled out all the stops and cooked a pretty impressive 5 course meal featuring amongst other things a fairly technical fresh lobster salad. Tablecloth, roses, candles, the works.
on the negative side (rather predictible) I of course succumbed (after some (I thought) genuine but (turns out) subconcious token resistence) and slept with him.
on the plus side, I had a lovely evening and the sex was really REALLY great. There was a lot of "I've really missed you" "let's get back together" "you are really beautiful" type stuff.
on the negative side, he is away for Christmas (out of the UK and out of Europe) visiting family so I know I won't see him until new year.
also on the negative side, it's now 48 hours since Friday - and I haven't heard from him at all - but that always kind of was his personality, he was very "pull back after intimacy". When we were dating before, it would really get to me and I'd chase him with "what a great evening" type texts. This time I'm more "meh! it's just him. he'll call me when he's ready. chasing him doesn't help either of us."
So summary
really really nice evening
he made a big effort
yes, reader, I shagged him and twas good
was it a catastrophic idea? I'll let you know at the end of January whether the "let's get back together" had really any intention.
But right now, I'm happy I went, would have liked to have heard from him since Friday but am OK with it all.
And yes, it turns out I am still in love with him all this time later.