There is every chance that your state pension won't be enough to maintain your lifestyle when you retire. By starting to save for your retirement now, you may be able to build up a supplementary pension that'll come in very handy when you finally stop working.
What's more, you qualify for tax relief each year on the amount you save, depending on your choice of formula.
Note: Sustainable pension saving is an investment that does not offer a capital guarantee. That means you run the risk of incurring a loss, but on the other hand your return could also be higher.