OK, you win. Double roundabouts, magic roundabouts, even hamburger roundabouts are a commonplace here but yours is definitely a winner.

To clarify, "exit 4", in this case, does not mean "exit 4 of the roundabout". Every motorway exit has a number and this one was number 4. So I would argue that even the number was redundant and a simple "take the exit" would be quite enough.

I paid more attention to this following this discussion yesterday. WhoGo consistently gives directions in the format, "<manoeuvre> to <street name or road number>". Examples - "turn left to Baker Street", "turn right to A44", or "take exit 4 to A404 High Wycombe etc". In all these cases, I would prefer a simple, "turn left", "turn right" or "take the exit", i.e. leave out the street name altogether. That seems to be a simple config option, but only otsaloma could confirm or deny it with confidence.