I reckon plumber chappie was shooting albatross from boat accompanied by two lads. He then turns to showing off his William Tell qualities, balancing a mobile phone on their heads and rocking motion means he accidentally kills boy one and mobile is lost. He frightens boy two into silence. Whole thing witnessed by Pauline while out walking dog on cliffs. She is now blackmailing plumber. Boat set on fire to hide evidence. Vicar will catch a large fish which has swallowed said phone - photos on phone will incriminate plumber in albatross-shooting incident which is probably illegal and he will crack under questioning and confess to manslaughter. [Can't have too many miracles where large fish are concerned] Blood in beach hut actually from earlier boyish blood brothers scene as a result of watching too many westerns. The pain caused by this made boy one run away leaving his skateboard behind which Pauline, after a bout of energetic dusting, rides home to the caravan which is downhill. She is too embarrassed to confess. Can't work the postman into this scenario so will have to have a rethink.