There are two permissible phrases used in the UK for radar vectoring to an ILS.
"Call-sign turn left/right heading xxx, report established on the localiser ( runway ...)"
or
"Call-sign turn right/left heading xxx closing the localiser from the right/left report established.
When the aircraft reports established on the localiser he will then be cleared to descend on the ILS.
If a controller omits reference to the localiser then this is wrong and can obviously lead to confusion.