Ebuyer has some budget Casecom computer cases, that at under £30 each are pretty good value for money - just don't expect too much.
Most come with 2 large fans and have space for loads more. Unlike they Fractal there are no drive trays, but since the hdd bays are pointing sideways drives are still relatively easy to install/remove.
Casecom K5-7688
Casecom KM-6988
Casecom KM-9188
Personally I would buy the Fractal case, at
< £52 delivered with 3 large fans and a fan controller it is a good value for money. I do rather like the drive trays, reminds me of my old Antec P160.