We booked the Mercure London Hyde Park for a one week stay many months prior to visit. We are from the United States and had been on a British Isles cruise before checking in here. Upon arrival at about 6:00 pm. We were told there was no room for our full visit, and they were moving us to Indigo which is a sister hotel attached to the hotel by corridor.
The good: Our room 414 was on the top floor and the noise was very little here. The move made us close to the exit that got us to the tube station easily and we used that a lot. It is just a short walk. The room was always cleaned perfectly each day. There is a fantastic included breakfast with our reservation as hotels share restaurant, but we forgot about this till morning of 3rd day and THEN they gave us vouchers. My own fault, but those should have been given on check in.
Staff was great about anything we needed.
The bad: I have read in reviews that this switch happened before to people so I feel like if they accept your booking, especially months ahead, it should not have this happen. Our room was booked as a queen bed and we ended up a VERY firm double bed. Room was small with little storage. We checked in late at 6:00 pm. and still had to wait another hour for them to get it ready. They did provide us with a dinner voucher for the restaurant onsite and it was a great place called Bella.
In the end, we had a wonderful stay after the initial disappointments. The hotels share all things so I was able to use the computer in the Mercure to print our Covid tests to return to United States. Also on the Indigo side, on first floor was a two for one Happy Hour from 5:00 to 7:30 on a beautiful terrace which we tried once and loved it.
The location of these hotels felt safe and very very convenient to getting to anywhere on the tube. It was easy to leave on the Heathrow Express upon checkout as well. There were many places to eat very close. We would stay here again, but it does seems your booking with this hotel is not really firm for place you will end up in their group of hotels. At least we were not moved to another sister hotel blocks away.
Other things of note: The shower was an over head or could switch to a hand held movable nozzle. The water was always good pressure and hot. They had a hot pot for tea, and a nespresso coffee maker with supplies in room. There is a safe, and there is a few complimentary drinks in the small refrigerator. The door key had to be reset a couple times as it stopped working. There is one little tiny elevator, slow but worked.
We had a wonderful visit to London!