Thank you everybody for replying and welcoming me!
Berryman: Thank you. I agree, he loved his food and the garden and, of course was a beautiful specimen that had origins in Dalmatia! So a tree from the same place that (I hope!) produces food is perfect!
Pino: I know, I have worries too and realise a pot would be better. However, I'm going to chance it as planting a tree in a pot in memorandum doesn't really have the right 'feel' plus I think the bronze plaque that I'm planning on would knock it over! If the little sucker survives the freight trip from Germany he'll be tough hopefully! I wish I had space against a wall, but unfortunately the suitable spaces (without Windows!) have really old pear trees and wisteria on. If things get really dodgy I always have the option of digging the rootex bag out (I've read that this is what a lot of fruit tree growers use for trees and it was one of the reasons I chose it as it means I have the option of taking it with me if I move!)
MStanleyross: I'll definitely try to keep everybody updated. Just ordered all my compost, manure, stake, protector, tree ring etc and have been pacing the garden (it was sunny today) to make sure the oak doesn't cast ANY shade on it! I now have the exact location and it gets sun from morning till late afternoon.
tsparozi: I will get another dog eventually...a bit early as yet and as somebody who renovates houses I feel it would be best to get one when I've finished my current project so I have time to slowly introduce them to the noise of power tools and hammers! I also need to make a decision on rescue or puppy.