When it comes to choosing a gym to start training in, there are literally hundreds to choose from. Particularly if you live in a large town or city, there can be numerous options out there.
The first decision to make is what budget you are willing to shell out. Some fancy gyms can cost upwards of £60 per month, the more basic or smaller gyms can come in at a much friendlier £20 per month. Obviously, depending on the services you are looking for, you may need to spend slightly more (or less!) than initially thought.
This leads into number two: what things are you looking for? If you want a basic gym where you can go to use some simple machines and complete a relatively simple workout, then a budget gym will do just fine. If you are looking for somewhere with access to a swimming pool, specialist classes or personal training options, then you may need to choose a larger, perhaps national gym company.