Denka, I'm actually Australian, but still in the UK. My London days were back in the 90s when I first moved to the UK. Now I live with my husband in a small house with a tiny garden on the outskirts of a town. He didn't have a clue when he bought the place, so it's west facing with a north facing garden! I've been able to establish a food hedge, but it's not as good as it good be. Unfortunately my husband inherited bare earth gardening ideas from his mother so keeps weeding out any understory plants I put in! His mother was so proud of her garden - all annuals carefully spaced in rows with bare earth in between, ripped out every autumn and replanted with newly purchased plants in spring, with all the fertility bought in via bags of compost from the garden centre.
I tried the allotments here, but they were very strict about keeping things annuals only, no fruits trees or shrubs allowed, the soil is solid clay, it's windswept and bleak, plus the council keep threatening to take it back and sell it to property developers! So I gave that up after one season.
I am also in the process of purchasing an old village house in Bulgaria on 2 decares. We've visited Bulgaria numerous times and talked about moving, but Brexit is an unwanted complication impacting both getting a visa and our finances. Also, though my husband might talk about emigrating, I doubt he ever will. In the meantime, I will visit the village house a couple of times a year to keep the roof intact and plant trees there, and it is my retirement/ widowhood/ mad old Englishwoman project!