In its last results, Virgin said it had three million users of its television services, 3.4 million broadband customers, 4.5 million subscribers to its mobile phone service and 4.1 million fixed-line telephone customers.

BBC: NEWS | Business | Virgin Media 'name change plan'

Calltrunk can record and store conversations made via any phone - fixed line or mobile - and has currently amassed more than 20, 000 customers worldwide after just over a year of operation.

BBC: Should we be recording our phone calls?