My apricot tree flowered really well and I could see the first signs of fruits forming. The blossom has now died along with the starting fruits and become brown and crumbly. The leaves seem to be curling up but not like peach leaf curl.
This sounds very much like blossom blight, caused by Maonilinia fungus. This is same fungus that causes brown rot in other fruit trees.
Here are some articles that will help you with more information and how to treat the tree.