Checking the CET:  A comparison of the Hadley CET and  Philip Eden's emulated CET     
                                      against the MO England and Wales temperature series      
The Hadley Centre's CET calculation has recently undergone a major change, involving the replacement of several of the
contributing stations. Their series is now based on Stonyhurst (Lancs), Pershore (Worcs) and Rothamsted (Herts), all of
which are Campbell Automatic Weather Stations.  The Philip Eden series continues to emulate Manley's original work
which calculates the mean between the Oxford district and the Lancashire Plain, and no changes have been introduced
to this series in recent months.  You can draw your own conclusions as to the efficacy of the Hadley Centre's change.