I know it is 10 years since the original post but I have only just seen it and thought I would share my memories of that gig as I had very a similar experience as a 15 year old. I was waiting at my house with a school mate for a lift to the gig from my dad when we heard it announced on the tv programme Look North that it was cancelled. I understand your desperate pain. The utter sense of relief when we found out it was to be re-scheduled and the tickets would still be valid was indescribable. I still remember the gig well. Jimmy's solo with the violin bow, Stairway to Heaven was still fresh. The band played a couple of tracks from their forthcoming album, Houses of the Holy. I remember Robert coming on for the encore trailing an extremely long letter about 10 feet long written by a fan which he cast into the audience. It was like the feeding of the 5,000. I think everyone got a piece. All for the princely sum of £1. This Wiki link has full details of the tour dates and set list. https://en.wikipedia.org/wiki/Led_Zeppelin_United_Kingdom_Tour_1972–1973