Helen Hutton instructed Machins Solicitors to seek compensation from Day, who acted for her in 2004.
The claim, which was issued by Machins partner Robert Bedford, says that Day was in breach of contract and acted negligently, allegedly causing Hutton to undersettle in her divorce.
Hutton says she was left with less than a quarter of her husband’s £220,000 annual salary when the settlement was reached.
She claims she was rushed into agreeing to the draft settlement after Day was allegedly late for court.
The agreement, the claim states, was “drafted and agreed late in the afternoon when the claimant was likely to be exhausted by the court process in light of her condition”. At the time Hutton was recovering from a knee operation and was taking painkillers.
At no point did Day highlight the concerns of the presiding judge about the level of the agreement, the claim says, and neither did Day arrange for the court date to be adjourned.
The claim was issued to Day’s lawyers at Thomson Snell & Passmore.