Since 1993, visitors have been allowed in to Buckingham Palace during the summer months to walk around lavishly-decorated 19 State Rooms. Following the Queen's death, no tours are possible and there is currently no public access to the historic building.
While tours are not operating at the moment, it is still possible to take a look at the gilded interiors - without a queue. Google Arts and Culture offers a virtual chance to walk through the palace with Street View.
It offers a glimpse of State Rooms used throughout the year for official entertaining and ceremonial functions - however the rooms might have a few unexpected additions. Cameras took a look around during an exhibition by the Commonwealth Fashion Council, so on the Google tour each room is adorned with mannequins that were dressed to impress for the occasion.