Jet blade identification

Found these jet engine blades yesterday which i’ve had for a number of years, no idea what they are, can anyone ID them? I was told that one is off a Concorde engine and the other from Harrier.

This one is about 35cm tall, with;

B507174
11168 8
JJC 1

scratched into the bottom

Next one is about 12 cm tall, with;

FK11415
B8936-23
JJG 1

scratched into the bottom

This one, about 8cm tall, has nothing but ‘scrap’ scratched into the bottom

These two which are curved and about 5cm wide at the widest, have, scratched onto the side;

YB13912354
YY4311502

on one, with ’40’ at the end

and;

YB13912354
YYC18224

on the other, with ‘3’ at the end. Could be wrong on the longer numbers on both as it’s very small