Mark Purslow, Cesar Chanal, Davy Morgan, Roger Stockton and his son Bradley all died.

It is the highest death toll in a single year since 1970 when six riders lost their lives.

A statement read: “ACU Events Ltd, race organisers of the Isle of Man TT Races have confirmed that a comprehensive investigative process is being followed for each of the serious incidents that occurred during the 2022 Isle of Man TT Races.

“The investigations systematically analyse every aspect of these incidents using established root cause methodology. 

“A multi-professional team involving all partner organisations reviews the events that occurred and recommendations on the way the event will be delivered in the future will be made.”

 TT Clerk of the Course, Gary Thompson MBE, BEM said: “After every incident we work tirelessly to understand the circumstances, establish key learning and implement changes as soon as possible. 

“Any fatality during an event is a tragedy. 

“As an organisation we promise to take any actions that can help improve safety and undertake this at the earliest opportunity.”

Five deaths at the 2022 Isle of Man TT

A total of 265 riders have died at the Isle of Man TT since 1911.

1982 was the only year without a single death.

Welsh rider Mark Purslow, 29, was the first to lose his life this year after an accident in practice. It was his second TT event.

Frenchman Cesar Chanal was announced dead four days after a case of mistaken identity resulted in Olivier Lavorel incorrectly being named.

Sidecar passenger Lavorel remains in critical condition. Rider Chanal died. The TT apologised for their error in identification.

Davy Morgan, a 52-year-old from Northern Ireland, died as a veteran of the TT having started 80 races.

Roger Stockton, 56, and his son Bradley, 21, from Crewe, were the fourth and fifth deaths.