Several UK companies including Waterstones Booksellers Ltd. and SumUp Payments Ltd. are considering deferring their initial public offerings in London to 2027, according to people familiar with the matter, denting the capital's hopes for a substantial revival in listings activity this year.

The potential delays signal continued uncertainty in the UK IPO market, where companies are reassessing timing amid volatile market conditions. Both retailers and fintech firms had been expected to bolster London's listing pipeline in 2024, but shifting investor sentiment and macroeconomic headwinds are prompting a more cautious approach.

Market observers note that the postponements could extend a prolonged dry spell for major London flotations, undermining efforts by regulators and exchange operators to attract high-profile listings. The Financial Conduct Authority's recent listing rule reforms aimed to enhance the UK's appeal, but practical execution remains challenged by global economic volatility.