His statue of Mary Seacole (2016), one of his largest works, stands in the grounds of St Thomas' Hospital in central London, looking over the Thames towards the Houses of Parliament.
On 30 September 2022 the Royal Mint unveiled Jennings' design for the obverse face of the British coinage, for which he had modelled the effigy of King Charles III.
[7] Jennings created a bronze monument commemorating the pioneer plastic surgeon Sir Archibald McIndoe which was unveiled in June 2014 in the High Street, East Grinstead.
[8] Also in 2014, Jennings completed a bronze statue of Charles Dickens, which was unveiled in Guildhall Square, Portsmouth, the city of the author's birth.
The first paid tribute to the women who worked in the armaments industry during the Second World War and was sited in front of Sheffield's City Hall.
The making of the Jennings statue was recorded in the ITV documentary David Harewood: In the Shadow of Mary Seacole (2016)[12] along with her life story.