If you live in a Millbank flat, you already know the drill: compact rooms, busy schedules, and furniture that seems to collect dust, coffee marks, and the odd mystery stain faster than you can keep up.

If you live in SW1P, you already know the small things matter: hallway carpets that pick up street grit, a sitting room rug that sees daily foot traffic, and the odd spill that seems to appear right before guests arrive.