If you are "cleared for the approach" there is no need to make additional radio calls.
Yes but I think that is the US version.
In the UK, they have (in recent years, anyway) avoided the Cleared for the XX Approach phraseology because the instant it is uttered by ATC, the pilot is entitled to descend, at an unlimited ROD, to the published platform, and UK ATC did not like pilots descending without a clearance.
But now it is coming back again.