John Laverty has undergone surgery on his shoulders following a vicious accident during first free practice at Oulton Park, the Buildbase BMW rider suffering a series of injuries.

Laverty crashed on the start-finish straight towards the end of FP1, a high-speed accident that prompted the red flags before he was taken to Countess of Chester Hospital.

From there, Laverty was diagnosed with a myriad of injuries, including broken ankles and a pelvis fracture, while his dislocated shoulders also necessitated surgery.

"John sustained two dislocated shoulders which were treated at the circuit medical centre and he had a further operation in hospital last night stabilising his other injuries which included two broken ankles, fractured right knee and a stable fracture of the pelvis," revealed BSB Chief Medical Officer Dr. Heike Romer. "He also sustained broken ribs which will not require any further treatment."

Laverty has had a difficult season since the Buildbase team's decision to switch from Kawasaki to BMW machinery, the Ulsterman down in 24th overall with just six points.