Market overview: FTSE 100 up 29

* username: rupertbu

15:15 Sainsbury's is now among the top risers in the FTSE 100 amid renewed talk that the Qatari sovereign wealth fund, which already owns 26% of the supermarket, is looking to do some kind of deal. Aero-engineer Rolls-Royce and medical devices group Smith & Nephew are currently jostling for top spot. Rolls posted a 15% improvement in 2009 revenues and S&N reported a 2% increase in full year sales and said is has seen signs that conditions in its markets are stabilising.