"It's nothing other than the fact that the relationship has been impossible to keep going due to their work schedules. Sarpong, 25, meanwhile, has been working on no less than three television series.
The couple had been two of the most eligible dinner party guests in the capital.
Here, the queen of the Sunday-morning schedules tells Ryan Gilbey about God, Ghana and her relationship with a Labour MP Welcome to the exciting world of youth television.
If you have celebrated more birthdays than can comfortably be represented by candles on a cake, you may not recognise the landscape any more, but don't be perturbed.
She has also appeared on BBC Television’s Question Time, 8 out of 10 Cats, and Have I Got News for You.Projects in development include a sitcom and a programme on climate change.They were fast becoming one of Britain's most highprofile couples - the young MP and the fashionable TV presenter.The combination of Sarpong's plain good nature ("She never says anything negative about anyone," Kay insists) and her co-presenter's naughty-boy antics is a winning one that shows no signs of waning.It looks effortless, I tell her when we meet for brunch near her south-London home. It's something you have to hear once in your life - that immense, celebratory roar that makes you imagine party poppers and champagne corks, in much the same way that cartoon characters see stars and chirping birds when concussed.Now, after dating for two years, David Lammy and Channel 4 presenter June Sarpong have separated, telling friends that they have been so overworked they have had no time to see each other. I know absolutely that no one else is involved." News of the break-up comes as 30-year-old Lammy enters a new and challenging phase in his career.