Princess Anne officially opened the BBC Pebble Mill building on 10th Nov 1971. The photo shows her being introduced to various members of staff in Studio A. The white haired man on the left is Dr Charles Hill (Chairman of BBC Governors) I think that it is David Rose (Head of Drama) who Princess Anne is talking to, 3rd from the right is Bob Gale (senior dresser).
Below is an invitation to the official lunch with Princess Anne.
Please add a comment if you can identify other people in the photos.
Thanks to Gail Herbert for making the photo and invitation available.