The agent that was listing on all three portals earlier this week was yesterday invisible at OnThe Market.

The agent was highlighted this week on EYE, and we have screengrabs to show that 247 Property Services was listing the same  property on Rightmove, Zoopla and OTM – in apparent breach of OTM’s strict ‘one other portal’ rule.

A spokesperson said yesterday: “We have a continuous and robust process in place to help us monitor and enforce our ‘one other portal’ rule, whereby agents joining OnTheMarket.com agree to list their properties with us and a maximum of one other competing portal.

“We react promptly when potential breaches of this commitment are drawn to our attention.

“We do not believe it would be appropriate to comment further via the media on our contractual relations with this agent.”

247 has also been offering a £99 listings service for vendors on the portals, on which only Zoopla has so far commented.