Previous:
Most States in a day:
3 (West Midlands, Southern England, East Midlands.) on 24/09/2006
Most Counties in a day:
3 (Gloucestershire, Oxfordshire, Warwickshire, ) on 12/02/2006
New:
Most States in a day:
4 (South East England, Eastern England, Southern England, West Midlands.) on 24/04/2015
Most Counties in a day:
5 (Hampshire, Surrey, Essex, Oxfordshire, Warwickshire.) on 24/04/2015
As I'm bottom part of Warwickshire, bordering Gloucestershire and Oxfordshire, not too difficult t get 3 counties. (As you say!)