These are fictitious uk phone numbers or temporary UK phone numbers. This implies that they will only be available for a limited time. Some uk phone numbers are valid for months, while others are only valid for a few days.
Please do not use a uk phone number for essential text messaging like passwords, secret text messages to pals, or website phone verification. By reading the text messages from these uk phone numbers, anyone could gain access to your account.
If you don't live in the United Kingdom but still want to use a website or app that only allows uk users, you'll need a phone number in the United Kingdom to authenticate your account.
Most websites that demand phone number verification impose a limit on the number of times you can use it. It is possible that some of our uk phone numbers will be blocked in this situation. But this isn't a major issue. Simply dial one of our other United Kingdom phone numbers.