With a £20 free no deposit bonus, you should, in principle, have a fair range of games to choose from, which includes slots, virtual table games, and possibly other offerings. The exact range of games available to you varies from casino to casino, so always check with the specific casino offering the casino bonus. Some may exclude certain games that can be played with only bonus funds, while others provide a wider selection. Familiarizing yourself with the game library and knowing any restrictions will help you make the most of your bonus.