Britain's antitrust watchdog on Tuesday raised concerns over competition in the multi-billion-pound cloud computing market.

Web Services could come under scrutiny from U.K. regulators after an independent investigation found a lack of competition in the cloud-services market.

UK Says Microsoft And Amazon Are Dominant Players In Cloud Competition  Britain’s antitrust watchdog on Tuesday raised concerns over competition in the multi-billion-pound cloud computing market and singled out Microsoft and Amazon as the dominant players.

Amazon and Microsoft’s cloud offerings have come under scrutiny as competition regulators have expressed concerns over their dominance of the market. The UK’s Competition and Markets Authority has provisionally found that competition in the sector “is not working” for consumers.

The CMA has published the provisional findings from its long-running investigation into the UK cloud infrastructure services market, and is considering taking targeted action against AWS and Microsoft out of concern about the competitive impact their hold on the sector is having.

AWS and Microsoft have been accused by the CMA of creating obstacles for competitors in the UK’s growing cloud services sector, costing businesses millions annually.

It found that there are alternative cloud suppliers face significant barriers to enter and expand in the market. Also, that "technical and commercial barriers" limit customers' ability to switch providers,