UK Stocks-Factors to watch on May 1

May 1 (Reuters) - Britain's FTSE 100 index is seen opening 4 points higher on Tuesday, according to financial bookmakers. * BP: Oil major BP Plc is closely following oil auctions in Brazil and Mexico, which are expected to announce new awards later this year, to decide whether to submit bids and expand its presence in the region, Felipe Arbelaez, the firm's chief for Latin America, said on Monday. ** SHELL: Royal Dutch Shell is fully committed to its gas joint venture in Iraq,