One common myth could land couples with a huge unexpected tax bill, according to leading lawyers.

Couples in long-term unmarried relationships could be faced with an unexpected inheritance tax bill, or loss of assets, due to a common misconception they have the same protections as married couples or civil partners.

Lawyers are urging couples in common law marriages to review their financial arrangements before the new tax year in April to avoid any shock bills.

As family lawyer James Myatt…