The books listed are Secondary sources and cannot be relied upon to say if an aircraft was or was not issued to a squadron.

The best sources are Primary and held at two locations in the UK. All are open to personal inspection.

RAF Museum, Hendon.

RAF Form 78
This is the aircraft movement card.
It lists the manufacturer, contract number, manufacturers airframe number and RAF Serial. On either side of the small A5 card are a list of units assigned to, issue dates and authority signals. A note as to it’s disposal may also be listed.

RAF Form 1180
This is the aircraft accident card.
This was raised for mostly non enemy actions.
The pilot in command is recorded, brief details of the accident, summary of the court of enquiry and safety equipment used/phase of flight.

The National Archives, Kew
RAF Form 540 and 541
These collectively are known as the Operational Record Book.
This is the daily war diary of the unit and list details of the operational flights undertaken. Monthly summary details are included as well as significant postings in and out.

As with everything there are slight variations in recorded information for card to card.

May be time to look at these sources before deciding which information is correct and which is incorrect.

Regards
Ross