Possible Clues:

• British stable
• They're stable enough for hawking but not spitting
• Alley cats are associated with them
• Cries like a gull
• Former stables converted into houses
• Street that was once stables
• A way to escape the Yard
• Gulls shed feathers at start of September
• Cries from cat heard in group of stables
• Row of stables, in Britain