[JMT1985]

That's pretty much the same with the specials being 60 minutes rather than 45, so equivalent of 4x45 min episodes.

I assume the series will be 45-50 minutes, though suspect with the flexibility to run longer as required.

Now that Disney has the international licensing rights, the BBC does not have to think about timings for commercial channels around the world. This is why for the 2005 until 2017 run, the regular episode was nearly always around 45 minutes in length, easy for international commercial channels to use in a one hour slot with adverts.

Now Disney is there, they don't have to think about that, and can run for as long as they can afford to