The head of operations for Morrisons' online grocery service has resigned weeks after joining the supermarket chain, according to reports.

George Dymond joined Britain’s fourth-biggest supermarket earlier this month to help launch its long-awaited online services, but resigned last weekend as his new role did not meet expectations, according to sources cited by the Financial Times.

Dymond was expected to be responsible for the day-to-day running of Morrisons’ online services, which are operated alongside Ocado. He is believed to have turned down the offer of an alternative role at the company, but remains under contract at the firm.

Dymond was originally recruited in October from his role at Australian supermarket chain Coles, having previously been employed at Carphone Warehouse for 10 years.

Morrisons confirmed that Dymond is still an employee of Morrisons, but did not provide any additional information on his current role. A spokesperson said that the supermarket is still on track to meet rollout targets for its online services.

Morrisons launched its online shopping services three weeks ago, years after its rivals introduced similar services.

The company began online food deliveries in Warwickshire from its Dordon online fulfilment centre, and plans to extend to Yorkshire in the near future. Morrisons aims to offer its online service to 50% of the UK population, including London, by the end of this year.

The company noted a decrease in sales over the six-week Christmas period, which was attributed to a lack of online presence. Meanwhile competitors such as Tesco saw strong revenues growth, with Sainsbury's posting record online sales of £5 million in the run up to Christmas. The annual turnover from Sainsbury’s online grocery sales now stands at more than £1 billion.

The launch of online services by Morrisons comes as the company attempts to modernise its outdated IT infrastructure as part of a wider £300 million investment outlined by chief executive Dalton Philips.