Another_CFI:
Holders of a valid instrument rating on their ICAO licence will allow the holder to exercise the same privileges as the UK IMC Rating (ANO Schedule 8 refers).
That 'same privileges as the UK IMC rating' bit was been removed from the CAA website piece some time ago. It's true it used to say that until it was pointed out it was wrong. The latest version is:
CAA FAQ on ICAO licences