Purdham made his representative début in 2001 for England's under-21 team during their tour of South Africa, scoring two tries in a 112–6 victory over the hosts.

In 2003, Purdham represented England A, appearing twice during the 2003 European Nations Cup.

England coach Paul Cullen named Purdham as captain in his 20-man training squad for the 2006 Federation Shield tournament.
Purdham lifted the trophy with a 32–14 victory over Tonga.

In September 2008 he was named in the England training squad for the 2008 Rugby League World Cup, and in October 2008 he was named in the final 24-man England squad, making two appearances in the tournament.

Purdham also played twice for Cumbria.
Purdham made his representative début in 2001 for England's under-21 team during their tour of South Africa, scoring two tries in a 112–6 victory over the hosts.
In 2003, Purdham represented England A, appearing twice during the 2003 European Nations Cup.
England coach Paul Cullen named Purdham as captain in his 20-man training squad for the 2006 Federation Shield tournament. Purdham lifted the trophy with a 32–14 victory over Tonga.
In September 2008 he was named in the England training squad for the 2008 Rugby League World Cup, and in October 2008 he was named in the final 24-man England squad, making two appearances in the tournament.
Purdham also played twice for Cumbria.
Rob Purdham