First Help squirt oil onto brakes t get tow job

After accident, first help were there in a flash, offering assistance and phoning my insurance to get authorisation before we even know what was happening. Car was drivable so I said we don't need towing. They were loitering around the front wheel and pointed out brake fluid leak on front wheel, which was odd as wheel was undamaged. Car was towed as best not to drive with no brakes. Obviously! After querying brake damage with panel beater, they said no damage to brakes at all, and it's an old gag to squirt oil onto brakes to get the towing job. So First Help just sprayed oil onto the wheel to get a tow when none was needed. They seem better than other towing companies, but really just the same low class ********s as all the others.