Costs from land line:
Call Connection Charge
The Call Connection Charge is £2.962 excluding VAT (£3.48 including VAT) and is added to the Call Charge. The Call Connection Charge includes up to 30 seconds of conversation time.
+ 50p per min after the first 30secs.
full list here
http://www.serviceview.bt.com/list/p.../2106_d0e1.htm