While Yorkshire's bowlers toiled throughout a wicketless afternoon at Canterbury yesterday, Michael Vaughan virtually ruled himself out of making a comeback in next week's Roses match at Headingley after admitting that he had recently suffered a slight setback in his rehabilitation programme.

Vaughan, who has temporarily left the Yorkshire camp to continue his training with England at Lord's, said it would take another week or so to get a little bit nearer playing.

If Vaughan is prepared to try out his fitness for Yorkshire Seconds he may be tempted to play for them in their three-day Championship match against Surrey Seconds at York from May 23-25.

Darren Lehmann was on 176 when he continued his record-breaking innings against Kent in the morning but his body had stiffened up noticeably after his epic batting of the previous day and when he had reached 193 he tried to hit Simon Cook through mid-wicket and his rusty shot went straight to Rob Key at mid-on.

The Australian's grand effort was spread over 317 minutes and contained 25 boundaries and, when he hobbled back to the pavilion, he had taken his tally of Championship runs this season to 500 in five innings.

Tim Bresnan remained grittily determined until he had batted for two-and-a-half hours for his 33 at which stage he became one of four batsmen to have their stumps knocked over by medium pacer Darren Stevens, who claimed career-best figures of four for 36, and Yorkshire were all out for 382 a rags to riches innings after being 34 for four.

Kent have quality openers in Key and David Fulton and both made sure but agonisingly slow progress in the afternoon session when they added only 92 and each completed his half-century.

Jason Gillespie and Deon Kruis, new-ball partners for the first time, bowled economically but without success.

Key began to open up after tea but having moved on to 81 from 185 deliveries with nine fours and a six, he shaped to glance Bresnan and was taken down the legside by Simon Guy.

His opening stand with Fulton was worth 153 and in the corresponding match at Canterbury four years' ago the same pair had featured in a record first-wicket stand for Kent against Yorkshire of 198.

Fulton moved on steadily to 75 off 207 balls with seven fours but then aimed a cut at Richard Dawson and was caught behind.

Lehmann hogged the limelight again towards the end by trapping nightwatchman Cook lbw, Kent closing on 196 for three, still 186 behind.