Repaired tanks went on to form part of Barbarossa. The clothing went to use for non front line services. The U boat crews had British battledress uniforms as working dress at one point. The boots were still in use in 1945, after all, German feet are the same shape and size as British ones. Being a mainly horse drawn army the Germans were always desperate for leather so anything with leather was sent to be reused in boot and horse tack production. The BEF, being a motorised army, only contributed a little to this though. I am pleased to say that my father came home from France with his rifle and a whole platoon of stragglers he collected and lead to the port whom he required to have or find a personal weapon, webbing, ammunition etc. so that was a bit brought back. The French troops were relanded back in western France with the personal kit they had brought with them in the evacuation to re enter the fighting.French troops made up a significant part of the troops evacuated as well as the defence of Dunkirk.