I was trawling the newspaper archive (britishnewspaperarchive.co.uk), taking advantage of their half price month offer (NOV50), and finally came across this advert from The Western Morning News and Mercury for November 20, 1926.

John Yeo is selling off the drapery stock from a number of businesses including Ellicott and Son. So we have an end date for the business, now we just need a reason.