Hand sketched upside down map of Britain ....
I also think that the capital city shouldn't be in the bottom right corner or the island so in my world London would not be the Capital city of Britain.
The trouble is there is no city in the Centre of the island, it is just a village and some farmland next to the Yourshire Dales, the nearest city would be Sheffield. I would settle for Liverpool, plus it is very close to Wales. I would make Liverpool the capital city of Britain and extend it so it is inside Wales slightly.