Hank, google 'treatment for codling moth' and select the RHS page - have a good read of that. Its too late for a pheremone trap or two this year, they should be erected in May, but that's your best bet. As its been such a cold spring this year, though, it might actually still be a useful thing to do. You can also order a nematode solution to spray on the tree, rather than using the nasty Provado, which kills bees and may be an ineffectual control for this moth. At the bottom of the RHS page, there's a PDF document you can click on and either download or simply open and read - it lists various pesticides which might be of use.

Thanks B, i'll do what you suggest. And I really appreciate yours and other's help. As I've said before I'm a complete beginner except for veg growing which your assistance I'm now half decent at.