Main dealers can't afford to charge minimal labour rates though.
I personally didn't have a problem using Renault for servicing, I just said 'I don't want any extra work doing without you talking to me first'.
They would always give the car it's yearly wash and vacuum too.
Took it to an independant once because they were offering £40 off the dealer price, I suppose that's fair enough, but they didn't wash the car, they didn't offer a pickup/collection, nor a loan car for the day and they put some crappy sticker in my window.