Ms Baldwin’s bill, supported by several MPs including Philip Davies, was scheduled to receive its second reading in February but was timed out. It will now have to be re-submitted after a new Parliament has been elected on July 4.
Campaigners say the upcoming wedding of the 7th Duke of Westminster at Chester Cathedral, one of the most glittering society events in years, only serves to throw the current injustice into stark relief.
The Duke, a friend of both Princes William and Harry, and godfather to Prince George and Prince Archie, inherited the title and seat at Eaton Hall from his father in 2016.
He also took on 140,000 acres of land in Oxfordshire, Cheshire, Lancashire and Scotland, and 300 acres in Mayfair and Belgravia. He is worth an estimated £10.127 billion.
Previous attempts to change the law were blocked by the Cabinet Office and many of the 92 male hereditary peers who remain in the House of Lords, much to the anger of women barred from inheriting titles.
Charlotte Carew Pole, of Daughters’ Rights, has long campaigned to change male primogeniture. She told The Telegraph: “This is a fundamental inequality. If this was any other section of society that kind of discrimination would prompt outrage and condemnation.