1. Department of Biosciences; Durham University; Stockton Road Durham DH1 3LE UK
2. School of Biological Sciences; Monash University; Clayton 3800 Vic Australia
3. Met Office Hadley Centre; FitzRoy Road Exeter Devon EX1 3PB UK
4. British Trust for Ornithology; The Nunnery; Thetford Norfolk IP24 2PU UK