We're closely matched then, the DY is running 67.8" - 700x23 with 49 x 19. I reckon your bike might be lighter, unloaded.
Perhaps, unloaded (it's ~11kg according to the manufacturer -- without guards/rack). The UCI have insisted I carry a pannier loaded with 5kg of ballast though
About 2kg of that is a f-off-big chain lock, made by that nice Mr ABUS, on the assumption that Writtle is a little more built-up than the usual venues, and the normal "minimal" cafe lock might be insufficient.
I even have the key for it with me this time.