BRUSSELS, May 24 (Reuters) - Lobbying groups

representing airlines, hotels and retailers have urged European

Union tech regulators to ensure that Google takes their views

into account, and not just large intermediaries, when making

changes to comply with landmark tech rules.

Airlines for Europe group that has Air France KLM

and British Airways owner IAG> as members, hotel group

Hotrec, European Hotel Forum, EuroCommerce, Ecommerce Europe and

Independent Retail Europe had in March expressed their concerns

about the impact of the new rules.

EU's Digital Markets Act (DMA) imposes a list of dos and

don'ts on Google and five other tech giants aimed at giving

users more choice and rivals a better chance to compete, but the

groups voiced concerns the the adjustments could hurt their

revenues.

In a joint letter to EU antitrust chief Margrethe Vestager

and EU industry chief Thierry Breton dated May 22 they said

their worries have mounted since then.

"Our industries have serious concerns that currently

considered solutions and requirements for implementing the DMA

could further increase discrimination," they wrote.

"Initial observations indicate that these changes risk

severely depleting direct sales revenues of companies by giving

more prominence to powerful online intermediaries due to the

preferential treatment they would receive," they said.

The Commission, which is now investigating Google for

possible DMA breaches, did not immediately respond to a request

for comment.

Google, which in a March blog post said changes to search

results give large intermediaries and aggregators more traffic

and less for hotels, airlines, merchants and restaurants, had no

immediate comment.

"We are concerned that the non-compliance investigation

refers only to the need to treat third-party services in a fair

and non-discriminatory manner, without any acknowledgement of

European businesses that also offer their services on Google,"

the groups said.