Thanks for the advice.
The lake district was amazing, there were so many great natural compositions and photo opportunities. I got back yesterday uploaded a few in my flickr account the last two pages.
In the end I didn't really use the 50mm other than for a few portraits and some low light on the beach. When I did use it, it was usually at about 2.8 unless I had some explicit bokeh idea..
I met a few EOS users on the hikes and talked them into letting me try their lenses.. it worked every time. I tried a Tamron 28-300mm f/3.5-6.3 -- it took some nice photos. The range would have been really very useful there although it's quite a bit heavier than the kit lens.
As for lugging the camera around it was quite a nuisance while hiking. We went on some really tough routes. I had a backpack, telescopic pole and then a camera at my side. I found the best way was to put the camera so it faced behind me then it didn't get in the way. Best of all it didn't rain at any time when we were outside -- what provision!