A pre-nuptial agreement for a retiring man with less wealth than his partner

We helped a man winding down towards retirement to draft a pre-nuptial agreement. He owns assets worth £2million and his fiancée has her own independent wealth worth £6million. We advised him on the full implications of signing the pre-nuptial agreement given his financial worth was significantly less than that of the future wife.
He also made a Will with us in accordance with the terms of the pre-nuptial agreement which was designed to protect the children on both sides, whether in the event of death or divorce.