Just looked at that, worthy of comment that
(a) Tesco is £1/month cheaper for the same as Screenselect, and
(b) The website looks suspiciously like a direct copy of Screenselect's. (Could it be perchance that Tesco is subcontracting?)
I'm not about to change for £12pa difference, too much like hard work, but if I was starting from scratch might give them a go..
G