"Battersea Power Station Underground station" . "Battersea Power Station tube station" . "2" . . "Battersea Power Station" . . . . . "Battersea power station tunnels" . . . . . . "true" . . "extension to the London Underground" . "Battersea" . . . . . . . "1" . . . . . . . . . "Battersea Power Station station" . . "Battersea Power Station tube station" .