Yorkshire powered on at the top of the Cricinfo Championship first division by crushing Lancashire by an innings and 37 runs at Old Trafford.

They bowled Lancashire out for 188 in their second innings to complete their first Roses double since 1978.

Richard Dawson was the Yorkshire hero with four for 29, although Gavin Hamilton made the early inroads after Lancashire had resumed on 74 for one and ended with three for 33.

Only Mark Chilton offered much resistance with a patient 74 as Lancashire slumped to their fourth defeat in five Championship matches.

Andy Flintoff was the first to go, missing out on his third consecutive half-century as he was bowled through the gate by Hamilton.

Joe Scuderi was trapped lbw for a duck three balls later, and Graham Lloyd gifted Hamilton his third wicket when he slashed a long hop to Gary Fellows at backward point.

Chilton and Warren Hegg then held up Yorkshire for 17 overs with a fifth- wicket stand of 50 but it was broken by Dawson who lured Chilton down the pitch and had him stumped after a 159-ball innings which included nine fours.

After that the Lancashire tail crumbled with a minimum of resistance, as their last five wickets fell for 16 runs in only 12 overs after lunch.

Chris Schofield hit a full toss back to Darren Lehmann and Hegg edged Dawson to slip where David Byas took a simple catch.

Then John Wood skied a catch to Craig White off Dawson, Glen Chapple was stumped and finally White splayed Gary Keedy's stumps - a fittingly emphatic end to the match.

Yorkshire's performance even surprised their own skipper, David Byas, who thought that they would be unable to force a victory, ahving lost four full sessions to the weather.

"When you lose that much time you just think you are playing for bonus points," he said.

"But White and Wood played brilliantly and they scored at such a pace that we could sacrifice nine wickets just to get as close to 500 as we could as quickly as possible.

"We have ended up with twice as many points as I thought we would get three days ago. I just never thought for a minute that this would happen.

"But we have had a bit of luck, missed a lot of rain and we have made the most of it."

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