[2] Whorwood represented Great Britain in the 2006 IPC Swimming World Championships, winning two silver medals in the 400m freestyle and 200m individual medley.

[3] He did not attend the 2011 European Championships, but did collect a silver in individual medley at the 2011 Paralympic World Cup in Manchester.

Although he did not medal at the 2012 British Championships, he more importantly swam under qualification time for the Great Britain team to take his place in the 2012 Summer Paralympics.

[2][4] At the Summer Paralympics in London, Whorwood qualified through his first heat in third place in the 400m freestyle with a time of 5:17.28.

On 1 September, in the final, he bettered that time with a result of 5:11.59 taking the bronze medal.