This page is based on information believed to be correct on April 8 2008.

Information on the costs of calls from BT landlines can currently be obtained from the web page

http://www.productsandservices.bt.com/consumerProducts/displayTopic.do?topicId=15718

 In particular, the costs of calls to specialized numbers (e.g. 0844, 0845, 0870, 0871), are detailed in a pdf document which is currently available at 

http://www.productsandservices.bt.com/consumer/consumerProducts/pdf/SpecialisedNos.pdf