In the United Kingdom, a regional casino (super casino or mega casino) was the largest category of casino permitted under law – equivalent in size to the larger casinos in Las Vegas. The first regional casino was proposed in 2007 for Manchester, but the scheme was scrapped by the government in 2008.

The Gambling Act 2005 revised many regulations relating to gambling in England. Among the more controversial provisions was the establishment of a number of 'destination casinos' in the style of Las Vegas, referred to in the media as 'super casinos'.

Initial drafts of the act proposed eight regional casinos, but concerns expressed in the national media and by a range of addiction-related social and religious groups meant that the final revision of the act permitted only one casino of the largest size, referred to as a 'regional casino', with a further eight 'large' and eight 'small' casinos of a smaller sizes and with reduced jackpot limits.

Prior to the act, there were 140 casinos in the UK, the largest of which in Star City, Birmingham had a floor area of around 950 square metres (10,200 sq ft). Customers were required to register twenty-four hours prior to gaming.

Under the terms of the Gambling Act, the Secretary of State is able to define each type of casino, with reference to any matter he or she chooses; although the act specifically mentions as facts to consider the number, location and concentration of gaming tables, and the floor area designated for a specific purpose.

Definitions were determined such that the 'super casino' would have a minimum customer area of 5000 square metres and at most 1250 unlimited-jackpot slot machines.

'Large casinos' would have a minimum area of 1000 square metres and up to 150 slot machines with a maximum jackpot of £4000.

The 'small casinos' would have a minimum customer area of 750 sq metres, up to 80 slot machines and a jackpot of £4000.