Posted: 02/04/2014 at 16:48
Difficult, JeJul. And outside my experience really, but I should think a bit of grit and leafmould at the bottom of the hole should help a lot. Then mix the clay soil with compost and grit. I expect the UK is in for a drought again this summer, sure as eggs is eggs!
My book says the hole should be 18 inches deep, 24 inches for cherries; good drainage is essential, as is shelter - fruit trees don't like wind. Apples and pears like full sun, or sun at least half the day. They shouldn't dry out so add plenty of 'bulky organic material' to hold moisture. Without going into details, it looks as though you should plant in January, feed in Feb and prune in March, except for plums which you prune in June. Of course, container grown plants can be planted out at any time. Hope this helps. I 'll look forward to more Comments.