Zoopla this morning reported what one analyst described as “significant agent losses”.

Zoopla said in a trading statement that it had record levels of consumer traffic, with 50.5m visits in January. It said that it had grown its reach and audience “significantly” and was continuing to invest in marketing its brands and “developing our platform to help … our members market their listings more efficiently”.

The update, covering the period between October 1 last year and January 31, said Zoopla will continue to develop “numerous further exciting features” over the coming months.

The update also said that, “as guided in November 2014”, the number of agency subscribers had fallen due to the launch of Agents’ Mutual and its restrictive only one other portal rule.

Zoopla reported that membership had fallen 11% by the end of January, down to 16,967.

Of that number 13,402 are UK estate agency branches, 2,793 are new home developments; 635 are overseas agency branches; and 137 are commercial agency branches.

However, Zoopla said that of the figures: “The UK agency number includes an estimated 500 branches that served notice in January and are no longer listing but are still paying members as at the end of the period.” At the end of September, there had been 16,373 estate agency branches.

It said that while it expects “limited further UK agency churn, this is likely to be partly offset by the return of some members who found the Agents’ Mutual restrictive ‘one other portal rule’ damaging to their business”. Zoopla said it is well positioned for long-term growth.

CEO Alex Chesterman said: “We believe that Agents’ Mutual remains a short-term event and that its success will be determined by whether consumers engage with it. So far it appears to have got off to a very slow start with consumers.

“We continue to enhance the services we provide to our users and the value we offer to our members, and our record traffic highlights the success of this approach.

“ZPG remains the best value digital marketing platform for UK property professionals and our focus remains on building our brands and business for the long-term and providing the most useful property resources to our users along with being the most effective partner for our members.”

City analyst William Packer of Exane BNP Paribas said this morning: “Estate agency members have fallen by a significant 21% since September (including 500 branches that have submitted notice but are not yet off ZPG).

“This leaves Zoopla with just 12.9k agency customers.”

* Eye’s story yesterday which carried Zoopla’s claims about traffic for OnTheMarket drew a statement from OTM chief executive Ian Springett towards the end of the morning.

Although we added it, the story had already been widely read and you may not have seen the addition.

Springett said: “As we have stated previously, the Hitwise figures which continue to be reported by Zoopla are inaccurate and demonstrate Zoopla’s increasing desperation to reduce the number of agents who are removing their properties and advertising expenditure from them to list with OnTheMarket.com

“It’s only our third week and we have already overtaken Zoopla in certain spots of the country with our property listings.

“We know OnTheMarket.com is already producing excellent leads for member agents and we are confident at becoming the number two portal within a year.

“In around 90% of cases, our members have chosen to remove their listings from Zoopla and we have also been told by many that having removed their properties from their less effective portal, it has become obvious just how many leads were previously duplicated.

“The feedback about the website has been overwhelmingly positive and our multi-million pound advertising campaign is continuing to drive the expansion of our membership base each day along with consumer traffic.”