791b4208_d_travel_operators___Telegraph__How_much_they_currently_cost
[Phone number prefixes] 09 numbers [How much they currently cost] 
Calls typically cost between 9p and £1.69 per minute or per call from a BT landline, but other landline providers can charge up to £2.60 per minute. From a mobile phone charges typically range between 50p and £2.50 per minute or per call
Premium rate phone lines ban for retailers and travel operators - Telegraph
How much they currently cost