[5] On 6 March 2009, Roynon crashed while practising with the Great Britain squad at the Norfolk Arena, King's Lynn and suffered a blood clot to his brain and a broken neck (C2 vertebra).
His survival chances were initially assessed as 50/50,[6] but his recovery "amazed" doctors who allowed him to leave hospital eleven days later wearing a halo brace.
[7] On 30 April 2009 his father announced that halo brace/hyperbaric therapy had been unsuccessful and Roynon would require surgery to stabilise his broken neck, further delaying his return to riding.
[9] In 2011, he was loaned out to Redcar Bears, also riding for Dudley Heathens in the National League, but a broken femur in April saw him again out of action until July.
[12] In 2022, he rode for the Scunthorpe Scorpions and Redcar Bears in the SGB Championship 2022 and Plymouth Centurions during the 2022 National Development League speedway season.