I, It's your call. If you feel that you and your family would be on pins and needles the entire time, I wouldn't do it. You could also go for him coming for a drink. If you opt to do this, be sure to thank him for doing it and let it go.
I think you are doing the right thing in flying over to London for your special day. You need a break and this is a very good way of getting away from it for a while.
I do find it rather odd that he's being so gracious in wanting to pay for the dinner, etc. I really do not trust him and usually when they are nice, they are up to something. Keep your eyes and ears open.
Listen to your gut instinct and if it says no, then don't do it.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
