Another gem of an innings from Michael Lumb could not prevent Yorkshire losing by 166 runs to Derbyshire at Headingley yesterday in their first Championship defeat of the season.

Derbyshire deserved their success for they were on top throughout the game and their margin of victory was the highest they have ever achieved against Yorkshire.

Yorkshire's only grumble yesterday was that the bad weather which had been forecast did not materialise after a delayed start of 45 minutes and, for most of the day, a large circle of blue hung over Headingley.

Chasing an unlikely target of 407, Yorkshire resumed on 12 without loss and never looked like saving the match, despite Lumb's unruffled 86 off 146 balls with ten boundaries.

The left-hander came in at 66 for two and did not depart until the final over of the match when he was lbw to Mohammad Ali the delivery after a no-ball had spectacularly flattened his middle and off stumps.

It was an astute bowling change by Derbyshire skipper Dominic Cork who had just re-introduced Ali into the attack, and after his first legitimate ball had accounted for Lumb, his fourth pinned Steven Kirby lbw to end the match with 21.2 overs remaining.

Michael Vaughan decided to take the attack to Derbyshire when he and Matthew Wood continued their opening stand but as in the first innings England's new one-day captain chanced his luck and on 16 he drove at Kevin Dean and was put down at first slip by Graeme Welch.

Immediately Welch came on to bowl he made amends, his second delivery skidding through and knocking back Vaughan's stumps.

In his next over he cut one in to Anthony McGrath to have him lbw and when Wood's watchful innings was ended by Ali the game was up for Yorkshire.

Although Yorkshire offered no excuses for their defeat, the replacement ball which fired out six of their batsmen in 48 minutes on Sunday was being sent to Lord's by the umpires for examination. The original ball was damaged when hit against railings by Lumb and the replacement swung around remarkably.

Yorkshire will try to make amends tomorrow when they seek to complete a Championship double over Northamptonshire at Wantage Road but they will be without Chris Silverwood who is having an injection on a shoulder injury which has bothered him recently while throwing in from the boundary edge.