The odds are like roulette, 0 & 00 & nowadays even 000!

The house rules in its favour:
classiic : low floor view of the alley and office building of Capital 1 or interior of H layout
high floor : anything > level 7
premium : larger room (some with bath tub) or double beds
premium city view : corner rooms and a wider view out on the street

Before commiting to a booking, i suggest to email:
reservations: [email protected]
guest relations: [email protected]
ask about current refurbishment status (which floors & wings)
& to politely request a room away from sounds of renovations .
You can even send along below and ask them which sections are first to be done

Hope this helps a bit. Good luck!