But as you know, first of all, all good online casino sites must have the correct license in place. We look at critical areas, such as bonuses, payment methods, customer support, and many more things. To qualify as one of the best casino sites on our list, the operators must tick many boxes. Our team has been assessing online casino sites in the UK for many years and knows exactly what to look for in a great brand so that we can save you a lot of time and effort. To make your choice a little easier, we have reviewed multiple casinos and have only published the very best UK casino sites that meet our strict criteria. This is exactly why comparison sites like ours exist. Deciding where to play can be difficult, and there is a lot to consider. There are more than 1,000 online casinos in the UK to choose from.