You can do a flydrive with VH and not bother to collect the car - you will be able to get cheaper car hire elsewhere. Just take the free 7 day car hire, no insurance and don't tell them you don't want a car as they will charge you a fee.
I don't know if you have seen the other threads but VH are giving some really good discounts at the moment for next year. I have just booked for end of August for 2 adults and 1 child and save about £1000 on what they were quoting a couple of months ago.