GB Queen Victoria FB And Wdo Cancels

I recently went through my old GB QV stamps and noticed four that were cancelled with FB and another one cancelled with what appears to be WDO. Can anyone shed some light on what these cancels mean and possibly where they were applied?

Based on Rod's training, I would say he WDO looks like a rubber parcel cancel.

I believe the FB are "Foreign Branch" for international mail. I think there was a recent thread about these.
Edit: https://goscf.com/t/12242&SearchTerms=bureau

Russ, thanks for the info and link that cleared up my confusion about FB.

Does anyone know what "WDO" means?

Nice going Smauggie!

yes, a GB 2-ring rubber parcel cancel...."W.D.O" is a mystery.

Probably London, something like Western Despatch Office.
A nice example for research.

Not saying this is it, but there is a Western District Office that formed a part of London's old post office rail system:

Excellent map Cjd, where does one find such treasures?

SCF delivers yet again,
I have snatched the scan and scarpered off into the night.

I'll go western district office.

Why, SCF, of course.

I know I didn't scan it (I don't have a hard copy, and it is a GIF), so I picked it up somewhere off the internet. I must have renamed it (though I don't typically use underscores), because Google couldn't find the file name.

I wonder if Collect British Postmarks discusses marks for the London underground mail train system? The system looks pretty limited in scope, geographically. Perhaps an interesting little sideline...a page with the map surrounded by stamps from some/all of the stations?

Thanks everyone who contributed to this post. I really am impressed with the knowledge and helpfulness of SCF members. By the way, I checked in my glassines and found another FB cancel but this time it appears be inside a triangle.

Here is GV cover to add to the samples

Nice,
you can see the impression of the knurled advancing wheel, to take the cover through the machine.

WDO is Western District Office.

The triangular marking was used on circulars, the giveaway being the ½d rate.