For the sake of £100 between F1 and MMC, I'd go MMC.
Think about it.... take off the hassle factor of driving down and leaving the car, combined with the petrol costs, tyre wear and mileage on the car etc.... and MMC is probably more sensible. Call me cynical but I wouldn't be surprised if some smart bod at MMC worked out that it would cost a punter about £100+service to go the F1 route so they just add it on to their service cost !!!
If you ain't bothered about the lotus stamps and it doesn't affect any warranties you may have ... go the falkland route.
Personally I'm getting my car serviced and MOTd today at an independant since I cant justify spending the sort of money MMC want on a <10k car / p****ty w**gon....

My C service cost about £350 going that route as opposed to the £1k ish MMC would have wanted.... no way I would have got £650 extra back if I sold the car now due to having an extra lotus stamp so it was a no brainer for me!
Anyway... you're loaded so what's the problem....
/2p
DDtB.