Average asking prices of properties new to the market have edged slightly down, Rightmove reported this morning.

While the fall is just 0.2%, equating to an average drop in the asking price of £730, Rightmove says it is the first fall at this time of year since 2010.

The portal says that there is no sign of any autumn bounce amid political uncertainty.

The number of sales agreed is down in all regions compared with a year ago. The fall of 5.5% is in marked contrast to the 6.1% rise in sales agreed that was reported by Rightmove only a month ago.

The number of properties coming to the market is also down on a year ago, by 7.8%. There are drops in all regions.

The average new asking price is £304,770, according to Rightmove. While down monthly by 0.2%, it is up by the same percentage on a year ago.

The monthly drop in average asking price also masks very different performances in the north and south.

In London, properties new to the market have price tags 2.1% cheaper than a year ago, and in the south-east, new asking prices are down 1.1%.

However in the north-west, new asking prices are up 3.5%, and in the north-east, Yorkshire and the Humber, and Wales, asking prices are up by at least 3%.

Although Rightmove presents today’s house price index as the September issue and talks about an autumn bounce, in fact the report covers the period from August 11 to September 7 – two days before Parliament was prorogued and the political uncertainty went up a gear.