Britain's financial regulator has fined Reckitt Benckiser for not informing the market properly about share trading by two senior executives in the latest crackdown on disclosure failures by London-listed firms.

Reckitt, whose brands include antiseptic Dettol and sore throat lozenges Strepsils, said it would continue to work closely with the regulator.

Reckitt failed to monitor the internal share dealings of the executives, leading to late and incomplete disclosure to the market, the Financial Conduct Authority (FCA) said.

It fined the company £539,800 for breaches of listing, disclosure and transparency rules between 2005 and 2012.

The fine includes a 30 per cent discount because Reckitt reached an early settlement with the FCA.