[PATV Scunthorpe]

I'd say it's certainly possible the 5am scheduling is for the episodes to be able to be shown in the on demand section, you definitely could watch them that way a couple of years ago.

When doing a search on Sky Q, the 'On This Week' tiles display the episodes being shown are the first of each series, Tuesday: S1 E1 … Thursday: S3 E1, I would assume showing one from each series allows them to upload the whole series to on demand.