Portishead announced a series of shows set for July on the weekend of 23rd and 24th at Alexandra Palace in London. Portishead will headline both nights, with a different supporting line-up joining them each day. The Saturday show will also include peformances from MF Doom and a reunited Company Flow. The sunday show will be Portishead, along with Swans, Beach House, Anika, Liars, and The Passion of Joan of Arc. Tickets will cost £59 per day with weekend tickets priced at £100. At this point these are the only UK shows Portishead plan to play in 2011, and you can get early bird tickets at reduced prices here.