The government in Valletta said proposed Irish legislation could prevent certain games being played here, so this could push people towards unregulated modes of gambling.

Malta’s government also claimed proposals to allow Ireland’s new gambling regulator to restrict times when people can bet may be disproportionate “without further empirical evidence, research and justification.”​

It used a European Commission technical regulation information system (TRIS) to voice its concerns.

EU member states can use the TRIS to make submissions on proposed laws and changes in other countries to prevent trade barriers occurring.

​Malta claimed part of the bill would enable the Irish gambling regulator to determine which games operators may provide, but claimed there was a “lack of clarity” on what these “relevant games” will be. The submission said restricting certain games threatened freedoms under EU law to provide services, and could also limit operators based in other member states intending to establish games here.

“Prohibition is not a proportionate and effective manner to regulate online gambling,” Malta claimed.

“The absence of a product in the regulated market may be counter- productive — in that, in the absence of a safe, legal and regulated offer, players might opt for the unsafe, illegal and unregulated offer.”

The tiny Mediterranean island is a hub for betting companies and has seen huge growth in the digital gambling sector. An analysis by KPMG found the sector accounts for more than 12pc of the country’s GDP, and the 300-plus gaming companies on the island employ 10,000 people.

The Department of Justice said it entered a consultation process earlier this year after receiving requests from the European Commission and Malta, but this process has since ended without the Government being asked to make changes to the bill.

“At its core, the bill is a public health measure aimed at protecting our citizens from gambling harm, including younger people and those more vulnerable in our communities,” a Department of Justice spokesman said.

The Maltese had also questioned the justification for the bill’s proposed limits on how much people can bet or win when playing certain games.

They also complained about proposed gambling advertising restrictions and asked why National Lottery ads do not come under proposed laws. The National Lottery comes under the remit of separate legislation.

The bill has been the subject of intense scrutiny. Lobbying registry entries show major betting firms have met or written to James Browne, the minister responsible for the legislation.

Mr Browne has also met with 14 charities or not-for-profit groups to discuss the bill, and has corresponded with another 40 charities.