Lynda MacDonald, 50, and her partner, son and his girlfriend, set out for their 6am morning swim at Lyme Bay, Dorset on August 3 when they were greeted by the bottlenose dolphin.

Lynda MacDonald, 50, and her partner, son and his girlfriend, set out for their 6am morning swim at Lyme Bay, Dorset on August 3 when they were greeted by the bottlenose dolphin.

A video showed the playful mammal dancing across the water in a vertical position asking for belly rubs and guiding people across the water with its beak.