Charlton comes in for Brakes
Charlton joined Worcester earlier this year from Corby Town and has been a regular performer for them this season.
Holleran said: “Asa will bring good experience and leadership to our relatively young squad.
“He has always played at a high level of non-league football and also had a short spell as a professional at Mansfield Town when he was 29.
Charlton has also played for Willenhall Town, Telford United, Halesowen Town, Redditch, AFC Telford United and Hednesford.
He was expected to be involved in Leamington’s game at Chippenham Town tonight.