Update, they've now officially told me they lost it. So it got lost on the day it was meant to be delivered huh. If someone did steal it then I guess congrats on your £10 CPU that might not even work, don't go flip it on ebay too quickly
I never found it, let's see if it shows up today or it's just permanently gone. I hope nobody stole it if they knew it was a CPU. What they wouldn't know is it's a Core 2 Duo.