Johnson flew various operations over France including the "Rhubarb" ground attack missions which Johnson hated—he considered it a waste of pilots. Several successful fighter pilots had been lost this way. Flight Lieutenant Eric Lock and Wing Commander Paddy Finucane were killed on "Rhubarb" operations in August 1941 and July 1942 respectively. Squadron leader Robert Stanford Tuck would be captured carrying out a similar operation in January 1942. During this time, Dundas and other pilots also expressed dissatisfaction with the formation tactics being used in the wing. After a long conversation into the early hours, Bader accepted the suggestions by his senior pilots and agreed to the use of more flexible tactics to lessen the chances of being taken by surprise. The tactical changes involved operating overlapping line abreast formations similar to the German Finger-four formation. The tactics were used thereafter by all RAF pilots in the Wing.