Orange have removed their fair use policy on all of their unlimited broadband plans, making them completely unlimited. Orange now state that they'll never charge their customers more for data, no matter how much they use.
Prices start at £7.50 a month for Orange mobile customers, and £12.50 for non-Orange mobile customers. The Broadband and Off-peak Calls package is currently free for the first three months!
It should be noted that while usage will never cause customers to be charged more for their data, Orange have not removed their traffic management policy which may mean that certain types of traffic will be given a lower priority at peak times.