This press photo is of Sian Phillips, playing Miss Matilda Crawley, in William Makepeace Thackery’s: Vanity Fair.
The sixteen part series was was transmitted in 1987.
The drama series was a London production, hosted at Pebble Mill. Terrance Dicks was the producer, Michael Owen-Morris the director, with Gavin Davies as the production designer, Joyce Hawkins the costume designer, and Lesley Perry as make-up designer.
Thanks to the BBC Drama Village for sharing the photo.