Ah that is the one I also have planted in my garden, it has survived over 10 winters in there, even 3 really severe ones with t°s of -12-15°C for a few days, my garden is an enclosed towngarden, not sure how it would do on the countryside. I think London has even slighter milder winters than Gent, Belgium. If I were you I would plant it in my garden, it will thank you!
My tree has grown into a beautiful specimen of over 2m tall!
