Kitty Hawkins (Amy Beth Hayes) is mad at Frank Edwards (Samuel West): he tries to make up with her and visits the make-up counter at Selfridges. He asks for advice: he wants to give something special to someone special (her ;)). She plays along: she suggests “a new perfume” by Guerlain, which happens to be Mitsouko in the traditional flacon bouchon coeur. This is a historically accurate choice, because the perfume was created in 1919, around the time in which the tv show is set.
Other products she suggests are Yardley facial cream (in the dark green glass pot originally used for English Lavender brilliantine) and a Penhaligon’s soap.
Last but not least, she mentions Lady Primrose hand lotion: the beautiful fluted glass jar shown is actually used for the Royal Extract body cream.
When the Duke of Windsor (Alex Jennings) is interviewed by a magazine reporter, he opens the doors of his private rooms. Four perfumes and a soap can be seen among his toiletries.
The second bottle from the left is 
The other two bottles are by Penhaligon’s. The one with the grey ribbon bow is 
World Wide Aura 
