There has been a big rise in the number of market appraisals, the UK’s biggest estate agent said this morning.

Countrywide said it carried out 24% more appraisals in June than in the same month last year – and it could be a sign that the property supply drought is ending.

In London, where a shortage of stock has been felt most strongly, the number of appraisals rose 14%.

Countrywide’s CEO Grenville Turner said: “If this rise in appraisals translates into a larger number of available properties coming on to the market, increased choice for buyers will serve to alleviate some of the upward pressure on house prices.”

The firm also said more than half the people (55%) who have so far used Help to Buy were formerly private tenants. A further 30% were living with their parents.

But Countrywide said that the 95% mortgage scheme has also “provided a lifeline” to people who already owned a property but lacked sufficient equity to move on.

Countrywide noted: “For existing home owners in parts of northern England who bought in 2006 or 2007, Help to Buy has provided a lifeline after falling house prices have reduced the equity of many households, preventing them moving.

“In the north-east, almost 30% of homes purchased through the scheme have been bought by existing home owners.

Nigel Stockton, group financial services director, said: “Help to Buy remains an extremely popular policy among aspiring home owners.

“While the use of the scheme by existing home owners is perhaps less politically acceptable, they tend to be households with little or no existing equity in parts of the country where house prices remain below the levels at which they bought.”

* The Land Registry has reported that house prices in May crept up just 0.4% across England and Wales to stand at £172,035.

However, prices rose in five regions – and fell in five. The biggest monthly fall was in Yorkshire & The Humber at 0.9%. Sales volumes in March, the latest figures available, were 63,587, up 16% from May last year.