Housebuilding group Abbey has announced the buy back of a further 540,000 of its own shares, or 1.48 per cent of its share capital, on the market on March 7th. A total of 500,000 shares were purchased at a price of #3.10 while a further 40,000 shares were bought at #3.15. Last Friday, Abbey bought back 78,945 of its shares at #3.20.