Worcester will co-host England Lions with Taunton and Bristol in a triangular tournament this summer.
South African all-rounder Johann Myburgh joins Somerset for the 2014 season following spells with Durham and Hampshire.
Durham will start the defence of their County Championship title with an away game against Northants on 13 April next year.
Veteran batsman Marcus Trescothick will remain as Somerset captain for 2014, with James Hildreth vice-captain.
Director of high performance Andy Hurry says Somerset's revamped coaching set-up will have a positive effect on the club.
Somerset revamp their first-team coaching set-up with the addition of David Houghton and Jason Kerr.
South Africa batsman Alviro Petersen is to return to Somerset as their overseas player for the 2014 season.
Director of cricket Dave Nosworthy says Somerset will learn from their "tough" Championship relegation fight this season.
Twin brothers Jamie and Craig Overton sign contract extensions to keep them at Somerset for a further three seasons.
Jos Buttler says his long-term ambition is to become England's first-choice Test wicketkeeper after joining Lancashire.
Somerset's Jamie Overton is reprimanded by the England and Wales Cricket Board for a breach of code while bowling.
Lancashire sign England limited-overs wicketkeeper Jos Buttler following the 23-year-old's departure from Somerset.
Marcus Trescothick insists he will not relinquish the Somerset captaincy despite a disappointing season with the bat.
Somerset confirm that Lancashire target Jos Buttler, England's one-day wicketkeeper, is to leave Taunton.
Lancashire are in talks to sign England one-day wicketkeeper Jos Buttler after deciding to release Gareth Cross.
Nottinghamshire and Somerset play out a draw at Trent Bridge on the final day of the County Championship season.
BBC commentators select and give the lowdown on county cricket's best XI of 2013
Marcus Trescothick should consider his position as Somerset captain because of his poor batting form, says Andy Caddick.
James Hildreth hits 161 before Nottinghamshire press for victory on day three, with both teams' survival confirmed.
Somerset reach 183-2 in reply to Notts' 406 all out at Trent Bridge as the relegation worries of both sides ease.
Video & Audio
Features & Analysis
Alec Stewart on England's most promising youngsters, his favourite Test century and the best bowler of all time
The ex-England captain on Chris Tremlett's Ashes chances, Gilchrist the great and imaginary fisticuffs with Michael Atherton
On the first day of the new county cricket season, former England captain Alec Stewart looks at the summer ahead