(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) * FTSE 100 flat, FTSE 250 off 0.5% Sept 28 (Reuters) - London’s FTSE 100 was subdued on Tuesday as losses in mining heavyweights outweighed strength in energy shares, while Smiths Group topped the blue-chip index after the technology company delivered positive full-year results. Shares of Smiths Group jumped 4.1% after the UK-based company signed a binding agreement to sell its medical devices unit, Smiths Medical, and declared a dividend of 26 pence following robust annual earnings. The blue-chip FTSE 100 index was flat with gains in Royal Dutch Shell and BP being outweighed by weakness in miners Rio Tinto and Anglo American. The domestically focussed mid-cap index dropped 0.5%, with travel and leisure stocks among the top losers. In company news, Goldman Sachs’ Petershill Partners unit traded at 350 pence per share in its debut. Bookrunners had set a price band of 320 pence-380 pence per share. Shares of Ferguson Plc gained 1.7% after the plumbing parts distributor reported higher annual profit. (Reporting by Bansari Mayur Kamdar and Shashank Nayar; Editing by Sherry Jacob-Phillips) Our Standards: The Thomson Reuters Trust Principles.