Anglo American will merge with Canada’s Teck Resources in a $50bn (£36bn) deal, shifting its headquarters to Canada and reducing its London presence in a move criticised by shadow business secretary Andrew Griffith. The Tory MP said it represents a blow to UK business and confidence in London. The new entity, to be called Anglo Teck, is expected to have roughly 70 per cent exposure to copper, as well as premium iron ore and zinc. Under the terms of the deal, Anglo will own 62.4 per cent of the combined group, with Teck shareholders…