Lucy Blake / SWNS

Little Alex had the £15.95 invoice put in his school bag after he failed to turn up to a classmate's birthday party at Plymouth's Ski Slope and Snowboard Centre before Christmas.

The Plymouth Herald reported that his dad, Derek, originally confirmed Alex would be attending, but he'd forgotten about a prearranged day trip with Alex's grandparents the same day.

He had no contact details for the friend's parents and Alex didn't turn up.