Glencore to be grilled by MPs over tax affairs Glencore has also been asked by MPs to allow a visit the Mopani copper mine, which has been the subject of intense scrutiny over its tax affairs and environmental record. Next week, Mr Glasenberg will kick start a road show to persuade investors of the merits of the mega merger with Xstrata. The combination of the two companies is expected to create the world's "biggest mining predator" and join the sophistication of Glencore's trading platform with the long-term planning and mine development capabilities of Xstrata. However, the deal has already unearthed fierce shareholder backlash from Xstrata shareholders, who complain that they are not getting a fair piece of the pie and that trading revenues from Glencore are not as reliable as those from traditional mining. Glencore were not avaiable for comment.