Investment bankers such as Goldman Sachs and Credit Suisse First Boston may still be slimming down, but the drought in mergers and acquisitions shows signs of ending. In the last 24 hours, no less than five deals were unveiled to investors. Admittedly, none of these are particularly earth-shattering or anything like the scale of the bubble deals of yesteryear, when Vodafone paid a whopping £79bn for Mannesmann.