Aldy

During the past two years our apple tree whilst displaying superb blossom has failed to thrive displaying crispy leaves and distorted small apples displaying lesions I am assuming that it is scab and wonder how best to treat. Photos attached, would appreciate your thoughts. Many thanks.

Immediately following a superb blossom I have noticed that leaves are sparse and dying appearing shrivelled. Could this be Cherry leaf scorch and if so how would I deal with it. The tree has grown higher than expected with thin branches except for the leader. Could the tree be reduced in height by half to encourage a wider shape. Many thanks