No maximum lead levels are set for game meat sold for human consumption in the UK so there is no protection for the consumer through food regulations. The easiest solution is to ban the use of lead ammunition.
Tests have shown that lead levels in game meat (eg partridges, grouse, pheasant) on sale in UK game dealers and supermarkets are usually higher than would be legal for beef, chicken, pork etc. Sometimes the lead levels in game meat are ten times those that would be illegal in non-game meat. Rarely the lead levels are one hundred times those that would be illegal in non-game meat. Very rarely, but sometimes, the lead levels in game meat are a thousand times those that would be illegal in beef etc.