From their website:
When Daimler couldn’t keep up production of the Dingo, Humber stepped in to build their now iconic vehicle. It was used primarily by British armoured units for scouting or liaison duty and was armed with a Bren mounted to the roof that could be operated from inside the vehicle if necessary. Production of the Humber continued throughout the war. We’ve got plenty of Mk II and Mk IV Humbers back in stock, plus a captured Humber.