UK toll free numbers start 0800 and are followed by a further 7 digits which makes the numbers look like this - 0800 xxx xxxx.
The UK have many toll free number ranges which include 0800 numbers, 0808 numbers and 0500 numbers. The most popular range used in the UK is the 0800 toll free number range.
The UK toll free numbers can be set up quickly (usually the same day) and can be connected to landlines or mobiles anywhere in the world.
MOBILE ACCESS SURCHARGE
As of July 2015 there is a mobile surcharge on UK freephone numbers, which was introduced by the reguator OFCOM. As the company that owns the number, you are required to pay for calls that originate to your 080 number from a mobile phone.