It is important to own your part and YOUR PART ONLY. You are doing so.
Try not to get so hung up on the move, that you are owning it ALL. Your H obviously had a say in the move to/from the UK. He wasn't completely voiceless.
Now that is in the past. You can only validate his feelings on the same issue for so long. At some point, things will need to change.
Perhaps: "I am sorry you feel that way. If I could do it over, I would do it differently. Unfortunately I cannot, however I will do my best to make changes going forward."
Next time he brings it up. "I have already apologized. Nothing is going to change the past by rehashing it over and over again." Then leave the room.
Sometimes I feel like we try to be so perfect in our DB'ing efforts, that we are walking on eggshells trying not to screw up. There is no magic bullet. You will find that some things will work and some things will not. When they don't work, dust yourself off and keep going.
Me:45 ExW:48 M:04/97 3 Bombs & 2 ReCons 1st BD 11/10 D Finalized 4/20 D-16 S-14 Going in one more round when you don't think you can. That's what makes all the difference in life.~Rocky Balboa