The Royal Connection
The Royal Family doesn’t tend to stay in any hotels in London being that they have their own castles, palaces etc. But there are several five star hotels in London that have major connections with the British Royal Family
The Goring
In my opinion, no where tops The Goring when it comes to royalty. It is the only hotel in London with a Royal Warrant for hospitality, this is where the now Princes of Wales stayed the night before she married William and it is rumoured that their butlers were trained by the Royal Household. And yes you can stay in the same room as Catherine.
Mandarin Oriental Hyde Park
The Mandarin Oriental has an entrance just for royals, which was built for Queen Victoria and Queen Elizabeth, and Princess Margaret took dance lessons from her.