Check each site's UK Gambling Commission register entry, then read bonus terms:...

https://emilysgreatjournals.quantlynix.com/posts/why-do-betting-sites-change-promotions-throughout-the-year

Check each site's UK Gambling Commission register entry, then read bonus terms: a 10x wagering cap isn't a blanket UKGC rule. Look beyond headline offers to mobile usability, clear limits and realistic withdrawal times before signing up.