I'm sure you know this, but for the benefit of those who haven't seen it before: it does not go anticlockwise. The"roundabout" in the middle is an illusion generated by the 5 normal roundabouts in a circle. There are no special rules.

It has a bad rep, but if you're used to British mini roundabouts, driving on it is a non-event. The regularity actually means it's simpler than other, smaller, but more arbitrary aggregations of mini-roundabouts.

Oof that looks brutal

My first encounter with this was on a foggy November morning, and I had no idea what was going on.

There's another very similar but smaller one at Heathrow, next to the Hatton Cross tube station. That one has the added attraction of London taxis and Ubers traversing it at high speed.