UK Stocks-Factors to watch on March 13

March 13 (Reuters) - Britain's FTSE 100 index is seen opening 13 points lower at 7,202 on Tuesday, according to financial bookmakers. * ANGLO AMERICAN: Global diversified mining company Anglo American Plc halted iron ore production at its mine in Brazil's Minas Gerais state after a mineral duct used to transport the product to an export terminal broke down, the company said in a statement on Monday. * BRITAIN BUDGET: Britain's finance minister is expected to announce on Tuesda