460 sqn Binbrook and Lancaster parts id

Hi
Quite a while ago I was given a few pieces from the site where Lancaster JB704 crashed on the 16th/17th December 1943 (Black Thursday) near Binbrook airfield when returning from a raid in Berlin .
Amongst the pieces were a exhaust stub and part of the rose turret rotating ring.
I have a couple of pieces which I hoped maybe someone maybe able to identify if they are Lancaster and if so where abouts they came from.
The piece on the left seems to have a magnet at the top of the spindle and the piece to the extreme right looks like it clips on something and also has a speed fastener hole on the bottom.
The piece top middle has some kind of thin brass skin on it so I hope that may help the identification of the parts.

If anyone could help with any information on this aircraft including code as all I can find is ar-? And maybe a copy of the loss card it would be greatfully appreciated as I am putting together a display in the former Shq at Binbrook to mark the 70th anniversary of the arrival of 460sqn to Binbrook.

If anyone could help with any additional 460 sqn photographs ,reports etc or anything to do with 460 or Binbrook to copy for display that would be extremely greatfully .

Many thanks in advance for any help .