Itsme said, Yes under the UK law a person who has been lawfully married can never have the marriage annulled because there is divorce here not annulment.
There is annulment in UK law.
It is where the court accepts that there was never a valid marriage.
The same applies worldwide to the Catholic Church.
One such UK case was Rolling Stones singer Mick Jagger's marriage to model Jerry Hall. It was found that they did not marry in Bali, when they went through a 'marriage type ceremony.'