i recommend going to watch it to anyone they're hilarious!if you go though wrap up in many a layer as its freeeeeezing and you have to take you're coats off else it looks random for filming!
go onto the site calle the applause store, you can get tickets for loads of shows, they're free to but most are quite a pain to get there. Top Gear is filmed in an Areodrome down south, near Guildford.