Research from Cornerstone Tax has shown that 15 million homebuyers have never even considered whether there was a mistake in the stamp duty they paid. This is despite the fact that the firm estimates that mistakes in advice mean that around 120,000 people in the UK are owed refunds for just one of the many issues with Stamp Duty advice.

In 2017/18, over £12.9 billion in stamp duty was paid by homebuyers in the UK, while in 2016/17 alone, over 6,800 additional property refunds totalling £80 million were paid - just one small section of the market, due to errors in advice.

it has been estimated that over £3 billion has...