Hey there!
Sorry this is probably a bit late but thought you'd might like to know generally about the event jobs. I don't actually work for Esprit but work for Brightsparks but practically every event I work at I end up working alongside Esprit people too. From what I understand (spending hours chatting with them all) is that the events they work for aren't necessarily as glamorous as advertised, it's normally typical weddings, corporate dinners and the occasional party nights. If i understand correctly they pay is circa £6.75 p/h whilst Brightsparks pay less @ £6.50 at some events but also £7.00 at other events so it's variable.
Give them a shot and they give you really good introductions whether it's your first job or 50th shift! Let us know how you get on!