There is a correct way: "changing to" it takes no longer.
The "Q" code was designed as a question and response code to make operations in morse more effcient, it was never designed for telephony use and was never recommended phraseology. After years of missuse, it was outlawed about 20 years ago.
CAP413 (whatever that is)
The UK Radiotelephony Manual, but also the basis of ICAO Doc 9432 Manual of Radiotelephony