WHAT IS THIS

WHILE OUT & ABOUT FOR A WALK THIS AFTERNOON, I SPOTTED THIS WILD SHRUB. IT WAS ON A LANE WAY IN AMONGST THE USUAL HEDGES. AT FIRST THOUGHT THAT IT WAS THE MAYFLOWER ( hawthorn).
IT HAS BEEN GROWING HERE FOR YEARS & YEARS. IT LOOKS LIKE SOME KING OF FRUIT BLOSSOM. THERE WERE SEVERAL BUSHES & ALL IN FULL FLOWER.