Frank Cooper's Oxford Marmalade is one of the most famous branded marmalades; Captain Scott took some on his expedition to the South Pole and it is mentioned in novels such as The Pursuit of Love and From Russia with Love. From 1903 it was made in the four-storey factory in Park Street, Oxford, which had separate sections for cutting, boiling and bottling - the photo shows female employees shredding oranges and wearing aprons and removable sleeves to protect their clothes. 

To make marmalade you need Seville oranges, sugar, water, a juicer, a sharp knife for slicing all the peel - and a good few hours. But as it is made only once, maybe twice, in January, the results - which last all year - repay the investment. Making Marmalade (1958, Museum of New Zealand) by Bernard Dunstan (1920-2017) captures the pleasure of unhurried preparation.

DH Lawrence once wrote in a letter, "I got the blues thinking of the future, so I left off and made some marmalade. It's amazing how it cheers one up to shred orange and scrub the floor". We couldn't agree more; although not everyone is cheered by cleaning the floor, there is no doubt that making marmalade is soothing and rewarding at times of stress and uncertainty. So, as Seville oranges are now in the shops and markets for just a brief period, marmalade is this week's subject. The painting is Seville Oranges on Slate (2014) by Emily Patrick. 

The Colour Room has a happy ending for Clarice Cliff (Phoebe Dynevor) and her boss, Colley Shorter (Matthew Goode); in real life they married in 1940. After the phenomenal success of the 1930s, her later designs were more conventional, and over time 'Bizarre' wares fell out of fashion. In the 1980s, though, her work once again became highly collectable, often fetching high prices at auction. The Clarice Cliff Collectors Club was founded in 1982 and continues to be an important resource.

Although Clarice Cliff is primarily associated with her bright, hand-painted "Bizarre" designs, she also experimented with glazes and created many innovative, deeply coloured effects. This Japanese-influenced cup and saucer features the 'Inspiration Caprice' design (c.1929-31) and, like many more Clarice Cliff pieces, is in the V&A collection.