Question about the Archives at Kew
BSD,
In your first post you said you were interested in the the records of a particular Halifax.
If by that you wish to access a copy of a particular aircraft's record card and any related accident record card you will not find them at Kew. Such records are held at the RAF Museum Archive at Hendon. You will need an appointment to visit the archive, though they will provide a record card copy by post.
You might like to check the RAF Museum website for more details and contacts.
As advised the National Archive hold such as the Squadron and organisational records, but by and large the surviving records of the hardware are at Hendon.
M-62A3