.THERE IS minimal uncertainty concerning the most likely winner of Britain's overall vote-casting on July 4th: with a top of twenty percent aspects in nationwide point of view polls, the Labour Gathering is actually very very likely to succeed. However there is unpredictability concerning the size of Work's bulk in Britain's 650-seat Residence of Commons. Some polling companies have published chair prophecies making use of an unfamiliar technique known as multi-level regression and post-stratification (MRP). What are these surveys-- and exactly how precise are they?