Related Clues:

• Not austral, and not the British navy, either
• Neither to the South nor the British Navy
• Neither the British army nor its navy, initially
• And it's not then about R, either, though it could be about Ulster (8)
• Not the South and not the British Navy, either
• And, it seems, it's not the British Navy, either
• Neither down South nor the British navy
• ... lights, aurora borealis
• Constellation of corona and 17
• Third line for the London Underground?
• He plays bridge with Eric's little mate from Lancashire, perhaps
• Throne rocked by ships of the line
• London Underground line represented in black
• Arctic - polar
• 14 13