not a whole lot of options for "full tower" and "under 100gbp"
the nzxt 530 isnt terrible and is under your budget.... but i'd go with a mid tower instead since it opens up more options in budget. like the corsair carbide series, c70, 400r... etcetera which are for the better part of 80gbp. antec one isnt terrible for the rather cheap price of 40gbp