A report by the UK Border Agency has alleged that trucks belonging to the Kawasaki WSB Racing Team were found to have contained quantities of class A drugs and a firearm when stopped at Dover on their way from Italy last month.

Officers allegedly found 18lbs (8kg) of cocaine, 157lbs (71kg) of amphetamine tablets and more than 220lbs (100kg) of cannabis. It was also alleged a handgun and 35 rounds of ammunition were also left lying on a table, unconcealed.

Four technicians from Paul Bird Motorsport, based in Morecambe, Lancashire – the company which runs the Kawasaki team – were arrested on suspicion of firearms offences and importing controlled drugs. They were later bailed.

They were Philip Roe, 40, a mechanic and truck driver with the team; Gary Matthews, 50, a truck driver and tyre technician; Mattia Fontana, 27, an Italian mechanic; and Daniel Swyer, 32, who is also a mechanic.

Attempts to contact the team have so far been unsuccessful.