More than 50 MPs are backing a parliamentary motion urging the BBC to screen an emergency appeal for Gaza, it has been revealed. The early day motion to be tabled by Labours Richard Burden has received the support of 51 MPs from across the Commons. The BBC is still holding firm over its decision not to broadcast the advert for the Disasters Emergency Committee (DEC). Director General Mark Thompson has rejected a plea from International Development Secretary Douglas Alexander, warning that a broadcast could compromise the impartiality of the BBCs reporting from the Palestinian territory. Thousands of people demonstrated against the decision outside the BBCs Broadcasting House in London on Saturday. And the Stop the War Coalition claims up to 200 people occupied the lobby of BBC Scotlands headquarters in Glasgow on Sunday afternoon. The corporations rival terrestrial broadcasters ITV, Channel 4 and Five said they would show the advert for the DEC.