Are you aware for just a little extra you can make your stay more flexible, offering you the possibility to check in to your room before the standard check in time which is at 3pm?
Early check-in is based on availability of rooms and can book up fast, so your best bet is to contact the hotel or chat with a friendly adviser. You can add early check-in for just £20 per room and you can check-in any time after 12pm?