Don’t suppose anyone knows exact size of the bolt that clamps the bar mount? Tried hope website but think they only show the newer quick release type one. Mine is slightly older thinking its a 5mm but not sure. Only need 1. Have a local screw fix if someone could tell me exact size.

Just email Hope and they’ll likely send you a new one…they did when I lost mine

Edit: mine is the QR one actually but still, drop them an email in the first instance and see what they say

I think I have one in my spares box, I can check in the morning if you like. The reason I have it there is that I bought one of these:
http://www.chainreactioncycles.com/hope-universal-handlebar-mount/rp-prod23533
It’s much easier to use as I swap my Trout enhanced V2 between a number of bikes so in my opinion well worth £8

Thanks guys. Phoned Hope and got size – better still they are going to post one too me!
Great service yet again- always buy British!