TalkTalk momentum slower in Q4

Carphone Warehouse has issued a Q4 trading update showing that subscribers to its immensely popular TalkTalk carrier pre-selection product grew by 114k in Q4. This is a weekly net addition rate of around 8,700, which is the lowest for four quarters and a significant downshift from the Q3 rate of 10,424. Difficult to say at this point what the reason is, but probably a number of things - perhaps Tele2 is gaining some momentum, perhaps other CPS players are getting their acts together, perhaps BT winback tactics are biting, perhaps it's Skype...