From 1st January 2015: -

The standard call connection fee will increase to 16p per call

From 1st December 2014: -

Standard line Rental will increase to £16.70

Plus (phone & broadband) package price will increase to £18.50

Anytime UK Calls boost will increase to £7.50

International Calls Boost will increase to £5.00

Some of our SMPF packages will be increasing by £5.

From 30th November 2014: -

Value Line Rental will increase to £180.36

See: http://sales.talktalk.co.uk/pricing/info/pricing-notification

Read here for more details.
https://help2.talktalk.co.uk/pricing-changes-1st-december-2014