It’s now moved from the northern echoes of T5C to the same northern echoes of T5A.

Looks to be right under zone A; perhaps the lost property office there?

As an aside; I had only 24 hours to report it to my travel insurance company - who have already approved the claim - but the lady I spoke with was understanding when I mentioned hold off paying out as I will exhaust all opportunities tomorrow to get it.

I’ll be riding my 50cc two stroke Vespa in from Reading so will need to avoid motorways… but that’s another story! I will update when at T5.

thanks all for the help!