Yes. I've spoken to TFL Licensing a few times about their map and basically they will claim copyright over any map that features the circle line in a "bottle" shape.
There are also restrictions over the font, logos and symbols.
There are also restrictions over the font, logos and symbols.
But where does the copyright infringement start? Could you technically get around it if you changed a couple of the colours and fonts around and used slightly different angles?
It might result in a few confused travellers, but hey.