Why on earth if you own a 17 plate merc would you feel the need to do 14 hrs on a sat , I’m guessing it o/ t as you say you had to run in this / last Saturday so it seems saturday is not part of your regular shift pattern
I’m away all week as I assume you are and tell them too ■■■■ off at the mention of o/t , I’ve not had to run in for a bit but to say I wasnt a happy bunny was a understatement when I had too
I can understand the young kid with mortage , kids etc , but a single bloke with a merc , zb me I’d be home , down the pub , ■■■■■■ up , shagging if I was young / free and single
not doing 14 hrs on a sat / fri night in the truck and worrying whether I’ll get a infringement 
By the way I drive a ford , and apparently get paid peanuts , live out of soup kitchens and they can still shove there o/t