A trick with battered fish is to add honey for flavour and for it to caramelise a little. nother top tip is to add a shot of vodka to the batter. Because it changes phase at a much lower temperature than water or any other edible liquid, it results in a much crispier batter. Oh, and the batter should be made at the last minute to keep the beer bubbles in. Many chefs propose letting the batter set, which means it allows the flour to be hydrated by the liquids, but this is pretty much irrelevant in batter making - more applicable to pastry making...