It looks like my plan to get back to the Cairngorms sometime in August have been hit on the head. I twisted my knee last week and it seems that I have damaged either a ligament or cartlidge. I injured the same knee a few years ago in a motorbike accident, Anterior Cruciate Ligament IIRC so it's already a weak spot. Off work now and some physio to look forward to, it was suggested by my GP that I'll need to build up the muscles around my knee to help stabilise it otherwise surgery is the only alternative.
Ironically I'd been working on getting my summer base weight as low as possible while using a 1.7kg tent and opting to use a DSLR rather than a compact. I guess my next trip will be a winter one so I'll need to work on that now instead.