Guests at a hotel in a central London landmark are being warned to close the blinds at night as they may be visible to neighbours.
Some glass panels at the Shangri-La Hotel at The Shard can act as mirrors once lights are on, offering a glimpse into nearby rooms.
The hotel, which opened last week on the upper floors of the skyscraper, has ceiling-to-floor windows.
A hotel spokesman said blinds were available for guest privacy.
Darren Gearing, the executive vice president and hotel general manager, added: "As a building created largely from glass, all guests can enjoy spectacular views of London from floor-to-ceiling windows.
"In some rooms, due to the unique shape of The Shard, guests may be able to glimpse into a neighbour's room. For this, blinds are available for guest privacy."
The hotel, in one of Europe's tallest buildings, has a champagne and cocktail bar with views 125m above the city.
Room prices start from £450 per room per night.
A spokesman said the quirk happens in a limited number of rooms and guests are warned that if they want enhanced privacy they should use the blinds, which were largely installed so they were not woken at dawn.