Thank you to both of the above. We have a mix of 10 apple & 3 plum so not too many, space for the is about 40 yds x 50yds. may be more, with a very overgrow hedge around it. (intending to trim this to about 4' come the autumn, we hoped this many also help to get light & air in to the trees. I did put some glue bands round in early May & not all the trees have this prob. The best one is favoured greatly by the blackbirds, who are eating the apples before we can get at them.
I thank you again for you help.