but their website ticks all the right boxes. They say what I would want a good webhost to say, and their control panel is one of the best I've seen. Prices are about right, and all in all, they look like a good bet.
The only real way to evaluate a hosting package is to use it however, or to get some feedback from existing users. You can see the latter on their website, and it's encouraging to note that in some cases they provide links to satisfied customers.
There's a 30 day money-back satisfaction guarantee, so you can try the service without committing to a full year, although in practice it can be a pain having to move a domain name from one host to another, so prepare to stay for at least a year. There can be no guarantees that the cost will be held firm after a year (with any host), although the business is highly competitive, and most companies try hard to stay low on price.
That last point can actually work against you sometimes. The business is extremely competitive, and modern server/software technology means that just about anyone with £200/300 can set themselves up as a hosting reseller. Many resellers do an excellent job, and provide all the support you'll need, but lots of them are here today and gone tomorrow, so be very careful if you're shopping purely on price - all that glisters is not necessarily gold in the hosting business.