This is a good alternative to Europcar, if the former doesn't have what you want and you need a last-minute rental. I think it's slightly more expensive for some cars, but it's only a matter of a few pounds. I normally stick with Europcar simply because I've used it abroad and know how it works, but this is very similar.
They rank their cars:
Economy (eg: Renault Clio)
Compact (eg: Ford Fiesta)
Intermediate (eg: Ford Focus)
Standard (eg: Vauxhall Vectra)
Full size (eg: Ford Mondeo)
At first, this seems a bit confusing, as it makes all the cars expect the biggest sound like they're not proper sized cars, but Renault Clios are fine even for 4 people going away for a weekend.
One word of warning: they're shut on Sundays, so it can be difficult if that's the first day of hire. Other companies in the area are often more flexible about this (try Eurodrive/Hotsons, for example). read more