A group of estate agents who admitted taking part in an illegal cartel are to pay fines totalling up to £372,233.

One of the agents is to pay almost £190,000 and another nearly £100,000.

The overall sum includes a discount because of the four agents’ admissions and their co-operation with the Competition and Markets Authority’s investigation into price-fixing.

A fifth agent has escaped fines on the basis that it continues to cooperate with the CMA, and an investigation into a sixth agent is ongoing.

The probe into the latest case, in Burnham-on-Sea, Somerset, began in December 2015 after the CMA received information following a previous investigation into agents in Hampshire.

In Somerset, the agents admitted to breaking competition law by colluding to set minimum commission rates at 1.5%.

This, said the CMA, was “with a view to denying local home-owners selling their property the chance of securing a better deal”.

The businesses were yesterday named as: Abbott and Frost, Gary Berryman Estate Agents (and its parent company Warne Investments), Greenslade Taylor Hunt, which has 17 offices in the west country, and West Coast Property Services (UK).

The agent to escape being fined is Annagram Estate Agents, trading as C J Hole, part of Xperience which in turn is now part of the Property Franchise Group where it is a sister company to Martin & Co.

Annagram was the first company to confess its participation in the cartel.

This is the second cartel case brought by the CMA against estate agents.

In the first case, members of the Three Counties Estate Agent Association were fined £735,000.

This resulted in the CMA launching a campaign designed to improve understanding of the law within the industry.

It was this campaign that resulted in the Somerset case being brought to the CMA’s attention.

Yesterday, it said: “We encourage others with evidence of competition law being broken to report their concerns to the CMA.”

In the Somerset case, Abbott and Frost has agreed to pay a maximum penalty of £30,099. This includes a reduction of 20% for settlement (to reflect the fact that the company has admitted breaking competition law and has agreed to follow a streamlined procedure for the remainder of the case).

Gary Berryman Estate Agents and its ultimate parent company Warne Investments have agreed to pay a maximum penalty of £97,807. This includes a reduction of 20% for settlement.

The liability of Warne Investments arises from the fact that it held (indirectly) 100% of the shares in Gary Berryman Estate Agents during the relevant period and, says the CMA, is therefore presumed to have exercised decisive influence over Gary Berryman Estate Agents during that period and to form part of the same ‘undertaking’.

Greenslade Taylor Hunt, a partnership, has agreed to pay a maximum penalty of £186,054. This includes a reduction of 20% for settlement and a reduction of 15% for leniency.

West Coast Property Services (UK) has agreed to pay a maximum penalty of £58,273. This includes a reduction of 20% for settlement and a reduction of 35% for leniency.

The CMA said it continues to investigate the conduct of a further estate agent, Saxons PS, which is not a party to the settlement announced yesterday.

The CMA stressed: “No assumption should be made that Saxons PS Limited has infringed the law.”