T'was indeed Jason Absalom. He lived just a mile up the road from me.
I didn't know him prior to starting racing, but we both rode TZR125 Ministockers in '91 and then contested the British 125 Championship in '92. He was way too tall for a tiddler, but somehow he used to wrap himself up on that Krauser and do ok.
I still talk to him now and again and we BS about the 'good old days'! He's still got his RS125 from '92.