The 21-year-old who has autism, Prader-Willi syndrome, septo-optic dysplasia and a learning disability, broke the record with a 21.3 metre-long drawing of his favourite train.

The Thameslink engine, complete with carriages, took four weeks to complete and beat the former record of 20 meters.

Adjudicators from Guinness World Records travelled to the National Star College, near Cheltenham, Gloucestershire - where Mr Price lives - and measured it with the help of staff.

They then presented him with a certificate in front of his former glamour model mother Price, teachers and friends.

Read more:
Metropolitan Police officers who made fun of Katie Price's son guilty of gross misconduct
Katie Price 'shocked and upset' by 'disgusting' remarks made about son

"I'm absolutely thrilled for Harvey. I can't believe he's got his own Guinness World Record. It's fantastic," Price said.

Art tutor Louise Adams said completing the drawing was a "very physical challenge" but Mr Price demonstrated his "impeccable knowledge of trains" during the process.

The keen artist is one of several individuals who wanted to challenge misconceptions about learning disability and campaign for change during the charity Mencap's learning disability week.

Guinness World Records have paired with the charity to allow reasonable adjustments to be made for record bids to better include people with learning disabilities.

"Who knows what weird and wonderful record could be set next," Alison Pike from Mencap said.