In the UK, employees are auto-enrolled, which means that all employees who are over 22 and under state pension age (it varies for individuals depending on when they were born - check details here), and are earning more than £10,000/year are automatically put into a pension or provided an option to join one straight away.
Being part of an occupational pension scheme has many advantages. Not only are you saving for your future, you get the added financial benefit of a contribution from your employer too. It's a simple and easy way to add to your make sure you can maintain your lifestyle, and be financially secure further down the line.
Moreover, most people can start taking money from their pension at the age of 55. You can learn more about this option here.