growing fruit trees

I don't know UK prices, but as long as the tree is in a pot, you can plant it anytime. You might want to phone around to other garden centres in your area and ask prices, and then you'll get an idea if that one is good or not. Fruit trees here run the equivalent of about 38 pounds this year. 

or you can wait till spring for all the low cost trees available from Lidl, Aldi etc. I think they were about £6 this year (someone will correct me if I'm wrong )
Not a great choice of varieties, but great value for money 

Yep your right about the price , i got a apple , plum and cherry tree ... planted them in March , the've all took really well 

 hi all and thanks for the info best wait till next spring   unless i see a bargain inbetween and maybe get a book from the library

If I recall my gardening lessons correctly, the name of the variety is not the same thing as the rootstock.

You could have variety A but grafted onto rootstock 1,2, or 3.  Therefore you could have the same variety but the rootstock determines eventual size of tree.

So, if I do remember aright, you need to know the rootstock as well as the variety.

Others will correct me if I'm wrong ...

If you do decide to plant anything now, then make sure you give them plenty of water throughout the summer. As they won't have a massive root system they will be more vulnerable to drought so they will love the extra water.