IWM caption : Group Captain P C "Pick" Pickard (centre), Commander of No. 140 Wing, No. 2 Group, flanked by Wing Commander I G E "Daddy" Dale, Commanding Officer of No. 21 Squadron RAF (to Pickard's right), and Wing Commander A G "Willie" Wilson, Commanding Officer of No. 487 Squadron RNZAF, visit No. 464 Squadron RAAF at Hunsdon, Hertfordshire, prior to a daylight raid against flying-bomb sites in the Pas-de-Calais. No. 464's De Havilland Mosquito FB Mark VIs have been loaded with 250-lb MC bombs for the operation: HX913 'SB-N' can be seen in the background.