Lack of apples

Last year my Braeburn apple tree had so many apples that I was giving them away now this year even after having lots of blossom there seems to be a lack of apples.I tried to count them and counted about 30 roughly.I pruned the tree at the end of 2016 which I thought was the reason for so many apples last year but why so few this year.

 

Basically, because the tree knocked itself out producing that bumper crop last year. It's a problem known as "biennial bearing" and this article from the RHS has some tips for sorting it out: Fruit: biennial bearing/RHS Gardening