He has played the long-running roles of Dale "Smithy" Smith in the ITV police procedural series The Bill and Adrian "Fletch" Fletcher in BBC medical dramas Casualty and Holby City.
He also played PE teacher Jez Diamond in BBC school-based drama series Waterloo Road.
When The Bill was axed in Scotland in 2009 by STV, Walkinshaw was the last person to appear on Scottish screens alongside Sam Callis as Sgt Callum Stone.
After The Bill was axed in 2010 by ITV, Walkinshaw admitted that "It was emotional shooting the final scenes" and that he found it "tough" to leave behind some of his co-stars.
[5] In 2011, Walkinshaw was cast in Waterloo Road as PE teacher, Jeremy 'Jez' Diamond, replacing Paul Nicholls.
[1] On 24 March 2007, he took part in The Weakest Link and won £9,450, which he donated to Essex-based charity "Kids in Need", which grants wishes for underprivileged, sick and terminally ill children.