By Huw Jones LONDON (Reuters) – European Union policymakers are considering extending some of the tough rules applied to banks to commodity firms to prevent a re-run of the problems they faced in meeting collateral payments after this year’s gas price surge, a document showed. Commodity markets have long been governed by relatively light regulation, but the EU document seen by Reuters said waivers for big commodity players from rules that govern banks could be scrapped. The latest push for tighter scrutiny follows price spikes ilnked to Russia’s war in Ukraine that forced governments to help w…