NEW laws are needed to keep opinion polls honest, says Huddersfield's Labour MP.
Self-regulation has failed and the arrival of new online surveys has undermined traditional impartiality, Barry Sheerman said.
He has put forward a Commons motion questioning the integrity of polling firms and it has been signed by 38 MPs.
Mr Sheerman, chairman of the Commons Education Committee, said a Government inquiry was needed.
He said his worries were shared by "a number of large players in the opinion polling business".
He added: "People can just set up to be opinion pollsters without any background at all. That is quite worrying.
"Many of them will not reveal the methodology they use, so you can't assess how accurate and reliable those polls are.
"And some of those polls may be producing the results that the people who pay for the polls want."