The BBC's much vaunted relaunch of its News 24 channel has been put back a week following Friday's huge power blackout.

The BBC's much vaunted relaunch of its News 24 channel has been put back a week following Friday's huge power blackout.

The revamp, which will see a spacious new set and graphics introduced, was due to go live today (Monday). This has now been postponed until next Monday (8 December) while the problems are ironed out.

The BBC has blamed an electrical fault for the blackout which saw BBC Radio 4, BBC Radio 5 Live and BBC News 24 knocked off air on Friday morning.

BBC director general Greg Dyke said "questions would be asked" over the failure which also saw the back-up system knocked out.

A BBC spokesman said it was decided to put back News 24's launch as the power was still much weaker in the area that it broadcasts from in BBC Television Centre in west London.

"The idea of not having a secure power supply was too risky," he said. "We are still working on it but it is much better than it was. We will have it ready by next week."