Lamb starred as Carl Morris in the series Moving Wallpaper from 2008 to 2009. He provided voice work for the TV series Technobabble from 2014 to 2015 and Danger Mouse in 2015. Lamb has also had recurring roles in the TV series How Do You Want Me?, Dark Ages, Rhona, The Armstrong and Miller Show, EastEnders, The Life and Times of Vivienne Vyle, and Goodness Gracious Me. Lamb is a shareholder in the soccer club Lewes FC in Brighton.