The fuel/admin fee needs to be added
Had a poor experience with these jokers over extra charges in a US car hire booking. my mistake was being foolish enough to think that they would be of help to you in the event of any difficulty. they basically refused to help - after some very little enquiries saying that 'the problem was between me and the car hire firm' . I'm pretty sure that consumer law says that when making a purchase through a vendor you are entering into a contract with them? I know that the booking concerned a US hire, but I still paid 'Holiday Autos' and they have been very poor. Just thought I'd echo the comments above about checking very carefully who the actual provider is when you book.
just did a search there and not a single car was offered at the £4.99 price. COLD!
and don't buy any extras which some company's try to make you think you have to, buy car hire excess insurance beforehand on the net, its cheap, you can risk not having any but i think its not worth the risk for what it costs.
@tinca There seems to be a lot available at that price, e.g. here