Amazon’s planned takeover of Roomba vacuum cleaner maker iRobot is being reviewed by the UK’s competition watchdog.

The Competition and Markets Authority (CMA) is looking at whether the deal could lead to “a substantial lessening of competition”.

Amazon is seeking to grow its operations for smart home appliances.

Both Amazon and iRobot have both said they are “working co-operatively” with regulators.

Amazon announced it was buying iRobot last year in a $1.7bn (£1.4bn) takeover deal.

Roomba models sell in the UK from £249, with some costing up to £899.Both Amazon and Massachusetts-based iRobot said they were “working co-operatively” with the relevant regulators over the merger.