Pressure is mounting on the National Museum of Science and Industry (NMSI) to settle a long-running pay dispute.

Nearly 30 MPs have signed an early-day motion that "expressed concern over the collapse of effective industrial relations at NMSI… where negotiations have reached stalemate and management is simply imposing its will".

And an e-petition by Prospect members on the Number 10 website said staff should not be subject to "derisory rises based on an unaccountable performance system".

An NMSI statement said: "Our pay award exactly mirrors our grant-in-aid settlements."