Yes, you can. 21.co.uk recommends the two different blocking tools listed below to help you restrict access to gambling sites and hide promotional material relating to gambling.

• BetBlocker- BetBlocker is a UK registered charity providing free blocking software to help you control your gambling. BetBlocker offers an app for Android, iOS, Windows, Apple, Linux and Fire OS and allows users to block their device from accessing tens of thousands of gambling sites and hundreds of gambling apps for between 24 hours and 5 years. No sign-up is required to use BetBlocker.
• Gamban - Gamban is a software product that aims to block all online gambling sites and apps on computers, mobile phones and tablets.
  It works on all the most popular devices and operating systems, is easy to use and non-intrusive. Gamban offers a reliable barrier to online gambling.

These blocking sites all work in different ways and we recommend that you visit their website to read more about how they work and find the one that will help you in the best possible way.