What is the biggest launch event in the UK?

The biggest launch event in the UK is currently the UKRA launch event held each June in Lincolnshire. However there are 3 other large launch events of the year, Big EARS in May in Cambridgeshire, IRW in August in Largs (Scotland) and K-lob in September in Lincolnshire. Each event caters for all flyers from model though to HPR.