I'm really intrigued to know how u got on at Glastonbury. Did u enjoy yourself, have a boogie? Get lost finding your tent?
As a fellow festival goer ( not big ones , 40,000 people ) I made the best decision last year and hired a mobility scooter. It gave me independence and my husband daughter could venture into mosh pit knowing I was ok on disabled platform, with a perfectly good view, without being jostled by others. It was recorded on tv, 2 months later saw them in front row watching seasick Steve!
My experience of the charity workers who are at these events are that they are a God send. Enjoyed watching Mumford and Sons.
Take care, hope your high if going outweighs the effects on your body. 
Is It Me Or Is It The Weather, My God I feel Awful !!
I feel a little let down by family and friends
First Rituximab infusion today : ) was not as bad as i expected........
How was your experience with steroid injection?
