So according to this I paid £83 in 1999 (and yes i did actually pay unlike many others!) so we are talking about 400% inflation.
I do get that many things will have improved since then but still seems a huge increase and I wonder how many students nowadays can afford it.
Gig tickets in general do seem to have gone up more than comparable stuff - for example I doubt tickets at Old Trafford have even doubled in the same time frame.
Also it's often quite different seeing a band on their own tour Vs at festival where they generally do shorter sets so not necessarily comparing like with like.