Apparently today!!! Didn't know till 2mins ago, gonna prolly bimble over later to test me puncture fix. 
Info http://www.calne.gov.uk/Calne-Bike-Meet-30th-July.aspx
Info http://www.calne.gov.uk/Calne-Bike-Meet-30th-July.aspx
Doin valve clearances? Use dappers valve shim exchange program and the job will be carroty - Free (other than you postin me yer shims) for sporting members.