A Greenwich data switch caption appeared and now we're on the technical fault caption and the announcer apologising.
EDIT: Been a few minutes now and we're still not back. There hasn't been any music played however.
EDIT 2: Ah after about 3 minutes they've finally got the usual breakdown track on.
EDIT 3: 7 minutes in and we're still not back. Seems like some pretty serious problems they have going on.
EDIT 5: Coming up to 12 minutes in and they're still off air.
EDIT 6: We're back... but Holly and Philip have been carrying on in the meantime fully aware they were off air.