G4EOW Peter 51998
G3XSD Graham 11674
G3OTK Richard 7490
G3NVB Vic 7367
G0BHK Ted 6108
G6MCX Paul 950
Correct as at 4/12/15
Itchen Valley Amateur Radio Club runs an annual HF ladder contest. Points are awarded depending on the country origin of the station contacted. This is based upon a scoring mechanism developed by Graham G3XSD which factors in both distance and number of available radio amateurs in the DX country.
As an aid to simplify scoring there is an online scoring program which will score any ADIF logfile.
For full rules see the HF ladder rules
The current scoring spreadsheet is downloadable here: