I went straight to the Nag's Head too and spent my emergency fiver on 'rehydration'. Left a pile of peat by the bar, they seemed to accept this as normal.
A jovial chap with a beard and an Edale Mountain Rescue helmet assured me that what I needed was a young Thai girl to give me a massage. I ran that past Mrs Brotherton Lad when I got home, but she didn't agree.