Thanks very much for your info !
I have found numbers on some parts:
Big jack: 250838
Small jack: 51211/3 and SR20440
one small part with gear 30066/5
Hydr.lock 35126 SHT and 33028 53 4
Partwith four large screws around it (what is it?) : 2998…..
Which of the parts on the photo are from a Spitfire ?