Another TV milestone has been achieved by the BBC today, with BBC Two the first channel to disappear entirely from the analogue spectrum for telly watchers who live in London.

The move, designed to free up space in the sky for mobile phones to use for Twitter all day, means the only way to watch the channel in the capital is now through a digital box or TV. The plus side for Londoners is this has already enabled the Freeview digital system to increase its coverage, bringing digital television and all its late night joys to some 400,000 additional viewers.

The second phase of the switchover will kick in on April 18, when all analogue signals will cease across London. The sky will look slightly bluer as a result. [Techradar]