Hi again mimi This would be my choice - Dessert apples: James Grieve, Cox's Orange Pippin, Fiesta. Cooking Apple: Bramley's Seedling. Plum: Victoria. Pear: Conference. They are all same fertile group, some are partly self fertile. November to March is th.e sort of traditional time for planting, but again container grown trees can be planted any time weather permitted. Use peat based compost for planting and some bonemeal. If you have a decent garden centre near at hand they should have someone who should be able to tell you the dos and donts. I personally wouldn't buy mail order trees, you are better seeing what you are buying..... best of luck.