Jayasuriya won the World Cup with Sri Lanka in 1995

The 38-year-old retired from Test cricket after the first match of the current series against England, but he will continue to play one-day matches.

A veteran of 110 Tests, Jayasuriya has amassed 12,207 runs and taken 307 wickets in limited overs cricket.

"His knowledge of the game will be crucial in the Twenty20 format," said Bears cricket director Ashley Giles.

606: DEBATE What do you think of Jayasuriya's signing?

"Sanath has vast experience in all forms of cricket but especially the one-day format.

"He will be a great man for the younger members of our squad to learn from, I am looking forward to working with him next summer."

Jayasuriya made his one-day debut for Sri Lanka in 1989 against Australia, with his Test bow coming in 1991 against New Zealand.

He was a member of Sri Lanka's World Cup-winning team in 1996, and is the only player in the world to score over 12,000 runs and take over 300 wickets in the 50-over format.