Berwick have confirmed that young Aussie Brenton Barnfield, ruled out of a starting place with the Bandits because of injury, has received a further setback.
The 18 year-old has been told that he cannot work, let alone ride a motorcycle for the next three months.
Barnfield had been handed a 2012 place by the Borderers after impressing on a mid-season visit last year.
But he fell heavily in the Australian Under-21 Championships at Kurri Kurri when he received a knock to the head.
Doctors, who initially induced a coma to relief his situation, prevented him from travelling to the UK to take up his team place in March.
But Bandits director George Fairgrieve revealed: “A further visit to a neurological specialist down in Adelaide has produced a warning that Brenton must not try to work, let along ride a speedway bike, for another three months.
“With injuries such as broken bones or twisted ligaments, the time-frame of recovery can be predicted fairly accurately. But with the brain, you have to be ultra-careful.
“If the doctors won’t even let him go back to work, we certainly can’t consider asking him to come over here and start skidding on his bike until he’s absolutely, totally, cleared by the neurologist.”