Siouxsie is one of the best and most influential post-punk bands. She is back this year. She'll be in concert in London next week this saturday 15 June and this monday 17 June at the Royal Festival Hall. updated: 70 new tickets available per night on the southbankcentre http://www.southbankcentre.co.uk/wha...rns-only-74202 http://www.southbankcentre.co.uk/whatson/siouxsie74924 .