The BBC has made a number of changes to its TV output following the news of Prince Philip's death.

This has left Line of Duty fans wondering whether episode four of the series will definitely air this evening, or if it will be postponed.

On Friday, the broadcaster plugged its schedule and ran special news programmes dedicated to the Duke of Edinburgh on both BBC One and BBC Two - which has divided viewers.

They were forced to set up a dedicated webpage allowing people to complain about 'too much TV coverage' on his death.

The rolling news coverage meant staples such as EastEnders and the final of MasterChef, which was due to air at 8.30pm on BBC One, were not shown. And a rescheduled date is yet to be announced.

Changes continued on Saturday also, with BBC One featuring a BBC News special on Philip from 10am until 2pm.

As a consequence, shows including Saturday Kitchen Live, Recipes That Made Me and Football Focus were shifted to BBC Two.

To make room, programmes including Blue Peter aired on BBC Two earlier than usual, with Friday’s planned episode of Flog It, which was cancelled following the announcement of the Duke’s death, slotted into the schedule at 2pm.

However, it's good news for Line of Duty viewers, as the show has confirmed it will air on Sunday at the usual time.

The official account tweeted on Saturday: "Beeeeeeeeeeeeeeeeeeeeeeep... Join the AC-12 interrogation, #LineOfDuty continues tomorrow at 9pm on @BBCOne."

What's even more exciting is that the episode is dubbed to be one of the best yet.

Martin Compston, who plays AC-12's Detective Inspector Steve Arnott, has said that episode four is a 'big one'.

Taking to Twitter, Compston said that it's some of writer Jed Mercurio's best work, with the potential of being a 'classic' in the history of TV dramas.

The actor also credits his co-stars for their performances in the 'midst of madness'.

He does a shoutout to Shalom Brune-Franklin, who plays AC-12's new team member Chloe Bishop, and Gregory Piper, who plays the undercover OCG member Ryan Pilkington.

Compston's tweet read: "Tomorrow’s the big one episode 4!

"On paper one of the best @jed_mercurio has ever written, if we deliver what was there potential to be a classic.

"Like to give a shout out to the young team Shalom and @gregorypiper98 who give outstanding performances in the midst of the madness".

Line of Duty will air at 9pm on BBC One. Catch up on all episodes on the BBC iPlayer.