Key Points
- Altenar’s sportsbook started operations at AdmiralCasino.co.uk on 21 August 2026, ten weeks after the signing of the contract on 18 June 2026.
- Tax on remote gaming in the UK increased from 21% to 40% in April 2026. It forced operators who mainly run casinos to look towards sports betting, which is taxed less heavily until April 2027.
- The online gambling sector in the UK had a gross gambling yield of £1.55 billion during Q1 of 2026, an increase of 7%, year-over-year, with sports betting accounting for 57.1% of total online gambling yield.
Ten Weeks From Handshake to Go-Live
A typical time frame for a B2B sportsbook integration lasts several months, sometimes even more. Therefore, the quick integration process that happened between Altenar and Greentube on the one side and their sportsbook partnership announcement on 18 June 2026 and the launch of AdmiralCasino.co.uk with the Altenar sportsbook platform on 21 August 2026 on the other side speaks more than the event itself. The fact that the gap between the announcement and the launch is less than ten weeks is exceptional because it shows that both parties must have been doing the preparatory work before the announcement took place.
As Charlie Williams, Commercial Director at Altenar, stated, “We are very pleased to see AdmiralCasino.co.uk successfully go live with Altenar’s sportsbook technology. The move from partnership announcement to operational delivery is a significant milestone, and I would like to thank both teams for excellent collaboration during the integration process.”
Now, AdmiralCasino.co.uk offers customers a range of Altenar’s pre-match and in-play betting markets, risk management capabilities, promotions and customizable front-end. Altenar has the combined remote operating license issued by the UK Gambling Commission under account number 53306.
The Tax Change That Made Sports Betting Urgent
Greentube is the digital gaming arm of NOVOMATIC, operating in over 45 countries and regulated by the MGA and UKGC. The product range of Greentube is tilted towards casino content, with some of their popular games being Cash Connection, Starlight Jackpots, and Book of Ra. This strategy has helped the company so far, but the tax reform that came into effect in April 2026 changed things drastically for the UK companies.
With the implementation of the change in April 2026, the Remote Gaming Duty in the UK jumped from 21% to 40%. The new tax would apply to all casino games available online, such as slot games, live dealer games, and even poker. On the other hand, betting on sports falls into a different category called General Betting Duty, and the tax for sports betting will only go up in April 2027 and will be at 25%.
Industry analysis from May 2026 identified this duty difference as a direct incentive for operators to shift product mix toward sports betting. Ronald van den Brink, Chief Commercial Officer at Greentube, did not frame it as a tax calculation, but the commercial logic ran underneath his words: “Sports betting is an increasingly important part of our product strategy, and integrating Altenar’s sportsbook technology allows us to enhance the overall entertainment experience we offer to our players in the UK.”
A Market That Earns Its Difficult Reputation
Williams referred to the UK as “one of the most competitive and challenging regulated markets in the world.” Hardly anyone would dispute that. The online gambling market in the UK earned a gross gambling yield of £1.55 billion in Q1 2026, marking a 7% increase from the previous year. Sports betting accounted for 57.1% of the revenue of the online gambling industry in 2025. Live betting accounted for 62% of the total gambling business in 2025.
Sports betting is the most popular form of gambling in the UK, with 47% of gamblers participating and roughly 290 million online bets on real events placed every month. Greentube Alderney launched AdmiralCasino.co.uk back in 2018, giving the brand eight years of UK presence and an established player base before a single sports bet was placed on the platform. The audience existed. The casino product was there. Adding sports betting closes a gap that competitors had already filled years earlier.
Van den Brink’s words from the June partnership announcement captured the competitive pressure: “Altenar has a strong record in delivering sportsbook solutions that perform across diverse jurisdictions, and by bringing that capability together with our content portfolio and technology platform, we’re well placed to offer something compelling in markets where the bar for quality continues to rise.”
Altenar’s Regulated Market Momentum in 2026
The deployment of the Admiral Casino comes under a larger trend of operations that Altenar is carrying out in regulated jurisdictions this year. In July, Gran Madrid Casino Online in Spain extended its cooperation with Altenar as the supplier of the sports betting solution. In August, DAZN Bet became operational in Ontario and Alberta, powered by the Altenar platform. The example of Spain is mentioned in the context of the Greentube deal by Williams as one of the priorities along with the UK.
When Altenar and Greentube first went public with their agreement in June 2026, Gaming Intelligence reported that no specific Greentube-operated brands had been named for the sportsbook rollout. Admiral Casino emerging as the first confirmed brand is a detail most coverage of this go-live has skipped past. It was not publicly predetermined. That makes the UK launch a genuine strategic signal, confirming where Greentube chose to move first when it had options across its entire network.
Expert Analysis
Here is what we find genuinely interesting about this launch: the public story is a sportsbook going live, but the real story is about who moves first when a tax regime forces the entire industry to rethink its product mix. Greentube chose Admiral Casino. It chose the UK. It chose August 2026, four months into a 40% casino tax that has no equivalent on sports betting until at least April 2027. That sequence is not a coincidence.
Our read is that this launch is a signal of intent across the broader Greentube network, not a single isolated deployment. A company operating in 45+ countries with a predominantly casino-led catalogue does not integrate a fully managed sportsbook on one UK brand and stop there. The architecture is built. The regulatory approvals are in place. The question we are watching is which Greentube-operated brand follows next, and in which market: Spain, which Williams named explicitly in June, feels like the most likely candidate.
What makes us most curious is the timing relative to Greentube’s iGB Live presence in London in July 2026, just weeks before this go-live, when the company was still leading with its casino game families. Sports betting was not the headline. By August, it was live. That shift happened fast, and fast in this industry almost always means the decision was made well before anyone was saying it publicly.
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