We will be closed from 5pm BST on Thursday 2nd April for the Easter bank holidays, re-opening at 8.30am BST on Tuesday 7th April. Any orders placed during this period will be processed when we re-open.

The principle in law that the rules are not changed in the middle of game, is embodied in the notion that legislation should apply prospectively. This study analyzes the legal constraints on retroactive legislation and the presumption of prospectivity and constitutional limits on such lawmaking.