The official value of axed Deputy Prime Minister Angela Rayner's Ashton-under-Lyne house was increased by family lawyers from £487,500 to £650,000 last April,

Exclusive: Land Registry documents show deputy prime minister used high street company for £800,000 transaction

The high-street conveyancing firm Angela Rayner used to buy a flat issued a devastating statement saying they had calculated the stamp duty based on the information she provided.