The ex-prime minister will advise leaders across the firm and provide 'insights on the macroeconomic and geopolitical landscape' alongside his job as MP for Richmond and Northallerton.
Gary Lewis, 65, collapsed to the floor in Northallerton, North Yorkshire, on July 2 last year after Darren Harris, 58, plunged a a syringe loaded with a muscle-paralysing drug into his thigh.
In shocking footage, Gary Lewis is shown sliding off a chair outside his shop in Northallerton, North Yorkshire, before being helped into the recovery position by police officers.
Darren Harris, 57, has gone on trial accused of administering rocuronium into Gary Lewis (pictured) at a record store in Northallerton, North Yorkshire, last July.