CHB Lo (Department of Meteorology University of Reading Reading UK), THM Stein (Department of Meteorology University of Reading Reading UK), CD Westbrook (Department of Meteorology University of Reading Reading UK), PR Field (Met Office Exeter UK), K Furtado (National Oceanography Centre Southampton UK), RW Scovell (Met Office Exeter UK), JM Wilkinson (Forecast Department European Centre for Medium‐Range Weather Forecasts Reading UK), T Darlington (Met Office Exeter UK), HW Lean (MetOffice@Reading Reading UK), R R. Neely (Institute for Climate and Atmospheric Science), CJ Walden (STFC Rutherford Appleton Lab.)