Having just done a search for 'best uk online casinos',the first link I clicked on listed the supposed best ten.Of these,six are on the 'not recommended' or 'no-can-do' pages here at Casinomeister or have received disparaging reviews from members.I would always use CM as my first port of call when trying out a new casino but it just goes to show how an unwary newcomer can be misled.
That will produce a ranking based on which casino is best at SEO, rather than which is the best for players to patronise. I made a couple of mistakes like this when I started, finding the notorious "Crystal Palace" to be the "No 1 casino to play at".
SEO is the process by which crappy sites manipulate Google in order to appear more highly ranked than better sites. To counter this, some advise to discard the first page of results and look further down.
Having found "a good casino", the next step advised is to search it by name, but adding terms like "problems", "complaints", etc. This will bring up more in the way of reviews and forum posts. This still leaves the problem of deciding which review sites and forums to trust, and this is something best learned through experience.
We could tell you that Casinomeister can be trusted, but ask the same question on a rogue site, and you will still get told you can trust them. Asking people you know is best, but for most people, they don't have many, if any, social contacts that are willing to be the first in the peer group to confess this "deadly sin" to the rest.
A site that rates casinos based on how easy a steal their bonuses are is not likely to be rating the casinos properly. Using such a site is risky, and often leads to players experiencing problems getting paid.