One of the DCPC “trainers” when I done mine was a former H&S representative in a M&S clothing factory (closed down) another was a former secretary/transport manager for a Coach company and I believe the third (i did my 35hrs in one week) was actually a LGV instructor.
Not saying they were a bad bunch though, I think it would have been as dull as dishwater and granny egg sucking no matter who pressed the powerpoint remote control.