On 3 April 1945 near Lingen, Germany, a bridge over the River Ems was covered by an enemy strong-point and prepared for demolition with . bombs. Captain Liddell, in command of a company which had been ordered to capture the bridge intact volunteered to disarm the demolition devices. He then had to wait some timewhilst covering artillery was brought up. He ran forward alone and, scaling a . high road block, crossed the bridge under intense fire. In full view of the enemy he disconnected the wires at both ends and also the charges under the bridge. His task completed, he climbed on the road block and signalled to the leading platoon that the way was clear for the advance across the river.
His Victoria Cross is displayed at The Guards Regimental Headquarters (Grenadier Guards RHQ) (London, England).