At the third stroke, BT will charge you 10 pence to listen to its age-old speaking clock service.
From 1 November, the cost of the 'time on demand' service, called Timeline, will rise to 10 pence per call. At present, customers only pay a local call charge for the service, with a minimum five pence charge.
BT is also increasing the price of its '192' directory enquiry service, from 35 pence to 40 pence. The service receives around 625 million calls a year, 60 per cent of which are from businesses.
BT said the changes to the '192' pricing are necessary to fund improvements and meet "increased costs". No explanation was given about the Timeline price increase.
Customers unhappy with the '192' price rise can instead use BT's free online phone directory, which BT says is handling three million searches a day.
Customers with disabilities can register to use the telephone directory service free of charge.
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