Face of Nation : Stars rushed to back the campaign to fund research into possible CF cures and treatments.
Presenter Richard Madeley, 63, looked a bit of a lemon sucking on the fruit and Doctor Who star Jodie Whittaker, 37, wore a yellow T-shirt.
Britain’s Got Talent judge Amanda Holden, 48, donned a yellow dress for her Heart radio show and Call The Midwife’s Jenny Agutter, 66, whose niece has the condition, posted a video of herself looking for yellow clothes.
Rugby League sides Wigan Warriors and Huddersfield Giants urged fans to wear yellow at their game.
Parliamentarians including the SNP’s Marion Fellows and Labour’s Sharon Hodgson took part in the Cystic Fibrosis Trust’s Wear Yellow Day campaign – but Health Secretary Matt Hancock made no mention of it.
Instead, he expressed support for Happy Suffolk Day, tweeting: “Let’s celebrate everything that makes our county a wonderful place to live.”
The Daily Express has been crusading for NHS England to strike a deal with US drugs giant Vertex for its life-saving CF drugs such as Orkambi.
In the three years Orkambi has been available, 250 sufferers have died needlessly. The list price for Orkambi is £104,000 a year, although Vertex has offered a “significant” discount to the NHS.