Hi Mysha;have a look at those listings as they will tell you what is on and where/when. Sometimes the listings do not make clear whether it is a festival that includes sessions or not. Some of the smaller, more do-it-yourself festivals may not be on these listings.

Once you have used the listings to suss out what events may interest you,then if you want to ask UK 'Catters any more questions e.g. About getting around between festivalsm or other smaller session based events that may not be in those listings etc then just come back and ask.