That's the last of the big four in the UK having initiated this filtering. New customers will have this turned on automatically, but by the end of 2014 we should have a better idea of the total impact of the filtering.
Virgin Media has turned on a filtering system to help parents stop children seeing inappropriate material online.
The firm is the last of the UK's big four ISPs to turn on the government-mandated filtering system.
Initially only new subscribers will be asked whether they want the filters turned on or off.
Like other ISPs, Virgin has pledged to ask all its customers by the end of the year whether they want to use a filtering system or not.Virgin Media UK Turns On Adult Filters For Users [bbc.co.uk]
Earlier story
UK ISP Site Filters: Government To Create Whitelist [webmasterworld.com]