What are actually MRP surveys and can they anticipate political election outcomes properly?

.THERE IS ACTUALLY minimal hesitation regarding the likely victor of Britain’s overall political election on July 4th: with a top of twenty percentage factors in national viewpoint surveys, the Work Celebration is actually extremely very likely to succeed. Yet there is uncertainty concerning the size of Work’s large number in Britain’s 650-seat House of Commons. Some polling firms have published chair forecasts using an unique method known as multi-level regression and post-stratification (MRP).

What are actually these surveys– and exactly how exact are they?