Some streets in the Royal Borough of Greenwich aren’t showing as streets within Greater London as well.
These streets show for Greenwich but not for Greater London:
The following street shows as being part of Greater London but not as part of Greenwich:
Unsure how to find the data on OSM to correct if indeed that is where the problem lies 
The issue is very likely that the update just hasn’t happened yet for the parent city.
I’d expect the next update of Greater London to resolve that.
I’ll keep an eye & let you know either way once updated 
Hi James,
Got email notification to say Greater London has been updated. None of the streets above were updated/deleted etc.
Then realised the issue was user error - There’s 5 Canberra Roads in Greater London! & I’ve only run 1 of them 