Except (with geek hat on and anorak firmly zipped up) that's not an Oly 2b, it's one of the very few Oly 2As. Part of the RAFGSA fleet at Andover when Andy Gough was CFI, spun in at an air display, and rebuilt as his first glider by Ralph Jones (in his upstairs bedroom flat in Andover, until his landlady found out and evicted him).