Former England Test players Jonathan Trott and Jon Lewis are to join England's coaching staff at the Under-19 Cricket World Cup.
Newly-appointed Sussex head coach Jason Gillespie wants the side to play a "very positive and aggressive" brand of cricket.
County champions Essex begin the defence of their title in 2018 against Yorkshire at Headingley on 13 April.
Sussex appoint ex-Australia bowler Jason Gillespie, who coached Yorkshire to two Championship titles, as their new head coach.
Audio & Video
Essex Eagles bowler Mohammad Amir fails to make two catches after earlier berating team-mate Callum Taylor for failing to spot a catchable ball in the sun.
Analysis and opinion from the BBC's cricket correspondent.
How to follow the Ashes on the BBC
BBC Sport brings you live radio commentary from England's Ashes series in Australia.
Cricket alerts, newsletters and social media
Get latest scores and headlines sent straight to your phone, sign-up to our newsletter and learn where to find us on online.
How to get into Cricket
How to get into cricket - physical exertion with a chess-like element in matches which range from half an hour to five days.