The portal's 75% fees cut for agents ends in just over two months' time but agents have only a small window in which to give the portal notice.

Iain White says that until campaigning groups such as Say No To Rightmove have a simple, unifying message for agents to focus on, Rightmove will win once more.

The Say No To Rightmove campaign, which is leading a group including three other organisations, says a further 7% are waiting for their contracts to end.

Rob Sargent of estate agency The Acorn Group submits himself to hard questioning over his motivations to set up and fund a campaign to persuade Rightmove to change its business and pricing.