re weather long term forecast is 17-22 degrees thru the day and a fair amount of cloud...which is pretty good
But please please do remembr to drink lots of water throughout the walk. you get a given (well have b4) a small bt beginning middle and end
Also id advice not to bring loads of 'stuff'...it will just be dead weight. Phone and money and a long sleaved Tee are the min and ideal extras.
So if u r in fancy dress id say dont go for silly wiigs/headgear or have to carry anything
Having said that im not following that advice

As im bringing camera and an extra lens... but recently bought an £85 backpack

wot is VVVVV well padded un comfy
ooooo wot sweets r peeps bringing?