Feb 24 until 0900Z Feb 25. Single operator and multiop-operator. Exchange RST and serial no. UK stations also exchange three-letter district code. Non UK stations work only UK stations and vice versa.
Multipliers are UK counties.
Final score is QSO points x multipliers. NC stations work everyone, others work NC stations only. Work stations once per band and mode. Work mobiles again as they change county lines. Exchange call sign, RST and NC county, state, province, or DXCC country.