BN Lawrence (STFC Rutherford Appleton Lab.), V Balaji (NOAA Geophysical Fluid Dynamics Laboratory & Princeton U.), P Bentley (Met Office Hadley Centre), S Callaghan (STFC Rutherford Appleton Lab.), C DeLuca (NOAA Cooperative Institute for Research in Environmental Sciences), S Denvil (CNRS, Institut Pierre Simon Laplace), G Devine (National Centre for Atmospheric Science (NCAS) & Reading U.), M Elkington (Met Office Hadley Centre), RW Ford (STFC Daresbury Lab.), E Guilyardi (Reading U.), M Lautenschlager (Deutsches Klimarechenzentrum), M Morgan (CNRS, Institut Pierre Simon Laplace), M Moine (CERFACS), S Murphy (NOAA Cooperative Institute for Research in Environmental Sciences), C Pascoe (STFC Rutherford Appleton Lab.), H Ramthun (Deutsches Klimarechenzentrum), P Slavin (Manchester U.), L Steenman-Clark (Reading U.), F Toussaint (CERFACS), A Treshansky (NOAA Cooperative Institute for Research in Environmental Sciences), S Valcke (CERFACS)