The Channel 5 News presenter was hit by a car but received no serious injuries.
Walker recently began presenting Channel 5 News after leaving the BBC.
Kay replaced Dan Walker who has moved on to Channel 5.
Find out more about the morning news presenter.
The 45-year-old TV presenter is leaving BBC Breakfast after seven years.
The BBC careers account has tweeted out a job advert as the organisation looks to find a new chief presenter for its breakfast TV show, amid Dan Walker’s move to Channel 5.
His co-host Sally Nugent has promised to bake him a tart for his leaving party.
Former 'BBC Breakfast' host Minchin joked she would be replacing Walker on the red sofa.
The morning news host was not on the BBC Breakfast sofa on Monday.
TV hosts were able to sit next to one another on the sofa again as government COVID restrictions ended in England.
The TV star explains how she copes with extremely early wake up calls.
'BBC Breakfast' has announced Sally Nugent as a permanent anchor following the departure of Louise Minchin in September.