Shadow health secretary Dr Liam Fox has promised to end 'postcode prescribing' by setting up a centrally funded national medicines budget for treatments such as beta interferon.The size of the budget would be determined annually by the health secretary, but spent by an 'exceptional medicines fund' committee of 'senior clinicians and academics'.The idea was welcomed by the Multiple Sclerosis Society.But King's Fund health systems director John Appleby said it would just shift decisions from health authorities to 'experts'- not remove rationing.'We do not need yet more committees charged with finding technical solutions to problems that are actually about ethics and values, ' he said.