A JAMES Hildreth century and 94 from Peter Trego enabled Somerset to dominate proceedings for a second day in their Specsavers County Championship clash against Yorkshire at Taunton.

Hildreth and Trego added 199 for the fifth wicket in a Somerset total of 562 for seven declared before the latter was out in the nineties for the second consecutive game.

His dismissal was followed shortly by that of Hildreth for a superb 166, both falling to the leg-spin of Adil Rashid.

The Yorkshire reply began with a three-figure partnership between Adam Lyth and Alex Lees until Jamie Overton made a breakthrough for the hosts by having the latter caught in the slips by Trego for 33.

But Lyth remained unbeaten on 80 at the close, having faced 152 balls and hit nine fours and two sixes, in a Yorkshire total of 127 for one, still 435 runs behind.

Somerset began the day on 342 for four, with Hildreth unbeaten on 68 and Trego not out on seven. The pair soon picked up where they left off the previous evening.

Trego played the supporting role in the early stages of the day as Hildreth, last summer's leading run-scorer in domestic first-class cricket, moved towards his second hundred of the season.

The former England Lions captain brought it up with a single off Rashid into the on side, his runs coming off 160 balls and containing 11 fours.

As the morning wore on Trego became more aggressive and took two sixes off Rashid, one over midwicket into the Somerset Stand and the other into the Sir Ian Botham Stand, before going to his third half-century of the campaign.

Trego then hit Lyth for a big six that landed on the top tier of the new Somerset Stand - the first batsman to achieve that feat since it was opened. By lunch the duo had taken the home side onto 493 for four.

The fifth-wicket partnership continued to flourish until it was broken when Trego was caught by wicketkeeper Andrew Hodd, looking to drive Rashid, with the total on 531.

Hildreth followed, caught and bowled by Rashid as he tried to work the ball to the leg and got a top edge. He had faced 237 balls and hit 17 fours.

Overton hit a rapid 23, including a maximum into the River Tone, before Somerset declared just before 2.25pm, Rashid ending with four for 160.

When Yorkshire replied Lyth, on two, had a narrow escape as he gave a very hard low return catch to Tim Groenewald's third ball.

Left-arm spinner Jack Leach entered the attack for the 10th over and was unlucky not to have Lees caught at first slip in his second over with the score on 24.

Lyth, who enjoys batting at Taunton, went to his half-century in the 31st over with a single off Lewis Gregory, a milestone arriving off 90 balls.