STEVE Johnston has become a full-time Somerset asset after the club agreed to buy his contract from the British Speedway Promoters' Association.And Johnston has agreed a deal to keep him at the club in 2010 and 2011.

STEVE Johnston has become a full-time Somerset asset after the club agreed to buy his contract from the British Speedway Promoters' Association.

And Johnston has agreed a deal to keep him at the club in 2010 and 2011.

He said: “Everything has been great since I first came to Somerset and I can't see why I can't be with them for the rest of my career.”