Can I challenge my ex wife on a ring fenced inheritance?

I have been given a consent order and financial statement form to fill in from my ex wifes solicitor, but on her side of the form she has not mentioned an inheritance, worth to her in excess of £200,000, she says it is ring fenced. It was a piece of prime land in West Sussex which is coincidently going for final planning on October 2^nd. I was divorced absolute this July after 38 years marriage. And she inherited this asset in 1987, six years into our marriage. Can she do this?