Ofcom:
Regulation changes for using 0800, 0900 and other non-geographic numbers. From the 1st of July 2015 the costs of calling NGNs will change to be an Access charge per minute + a Service charge per minute. Make sure that you check this Ofcom link and think about how you use NGNs.
http://www.everycloud.eu/res/Ofcom%20Changes%20to%20Non-Geo%20Numbers.pdf
