It looks like the new series is four episodes long on the iPlayer, but NE&C have stitched them together into two 30 minute episodes and shown them on BBC One this week (in place of repeats of Cuckoo)
They also showed omnibus versions of the first series back in April.
FWIW it was back to the usual one last Friday. Maybe they were just checking someone is still bothering to keep an eye on BBC One pres
Not often we see this anymore though...
PRESWATCH: BBC One's old promo endboard style (with the smaller text) reappears as a 'coming up later' graphic, voiced live by the continuity announcer. We don't see these too often. Here's how it looked, across the nations, just before 10pm. pic.twitter.com/NZ4JPkKrj5— Clean Feed @ The TV Room (@cleanfeed_ttvr) June 8, 2020