Novice Player w/ Sealion Issue

[wargameplayer]

So I've searched the manual and forums but can't quite seem to figure out how to make the port next to london "friendly".
I landed two paratroopers and took london but the adjacent port is still marked as UK control.

I can't move ships into it or troops let alone get my transports thru it. any ideas what Im doing wrong?

[HamburgerMeat]

Mind uploading a screenshot?

Maybe theres still an allied unit adjacent to the port

[wargameplayer]

There is an air unit in the hex south of the port. I figured if I took London, I'd get the port! that must be it!