Hi Norm, this is just a stab in the dark but considering the time lapse it may be an answer. I can't find anything on Task Force Zulu during the era you are speaking of.
If you recall the 1st Division moved to various locations in East Sussex about the time of Dieppe minus their transport. Garry Shipton whose father was in the Service Corps says that his father told him that roads to the channel ports were clogged with Canadian vehicles loaded with supplies to go on the ships when they returned from Dieppe. I wonder if this part of the operation could have been the task force you speak of.

"The battalion returned to Littlehampton and their next task was to train the Home Guard to take over the Beach Defenses. On July 20th three more men were killed when a Boston Bomber the had scrounged a ride in collided with another aircraft. Corporal William Barnett, Privates Jack Orvis and George Palmer were buried in Brookwood Cemetary with full military honours. Exercise “Independence” began on August the 4th with the 48th marching out of Littlehampton, their transport was withdrawn and the infantry companies camped their way across Sussex to Gray Wood. The rest of the 1st Division was also on the move without their transport.
August 19th found the 48th and the rest of the 1st Division on “Exercise Exterminate” while the 2nd Canadian Division was fighting for its life on the Beaches of Dieppe. Brigadier Bill Southam a former C.O. of the 48th was taken prisoner during this operation. One report has all the 1st Division transport lined up to support the operation at Dieppe;

“We waited on all the byways into New Haven loaded to the gunnels with ammo/supplies and expected to be ready to load on returning Landing Ships” (L/Cpl. William J. Shipton RCASC) "

http//dileas.mapleleafup.org/