On 13th June,2014 BBC issued the following statement regarding disruption to BBC SW services to West and Central Africa.
During the morning of Wednesday 11 June, the BBC shortwave broadcasts in English, French and Hausa to West and Central Africa were affected by problems with the electrical power supply at the transmitter station on Ascension Island.
The power was lost at 00:40, and some services were moved to other transmitter sites that regrettably cannot offer the same quality of service. Broadcasts on a few frequencies could not be transmitted at all between 05:30 and 06:30. Since then, the BBC has been able to restore some services so that they are again being broadcast from Ascension. These will continue to be broadcast through the weekend, and the BBC plans to re-instate the full service on the afternoon of Monday 16 June. We very much regret the loss of service to the audience caused by this major fault.
(BBC Press Release)