Royal International Air Tattoo (RIAT) is the biggest airshow in the UK and among the biggest in the world. Currently there are three display days but for the enthusiast it is possible to attend for all six days. My best advice is go to the official website and have a look. NOTE, due to Covid19 there will be no RIAT in 2020 and many other airshows are also cancelled. Check the relevant websites for the latest news.