Lancashire smashed an incredible 554-3 dec against Gloucester, Paddy McKeown leading the way with an unbeaten 307 including five sixes and 40 fours.
It was an individual second team record, beating the 244 not out of David Varey against Derbyshire at Blackpool in 1984.
Coach Peter Sleep described it as ``possibly the most sensational batting I've ever seen.''
But Sleep also had praise for Harvey, who claimed 90 and wicketkeeper Jamie Haynes (120) saying: ``They were superb too, and in all it was a fantastic day.''