A father and son dispute being heard in London’s High Court is “a stark reminder” of the risks of agreeing significant family arrangements without clear legal documentation, a private wealth dispute expert has warned.
Kate Harris, partner in the private wealth disputes team at Birketts LLP, said Harry Lambert’s £2 million claim against his father Christopher Lambert (pictured) highlights recurring themes seen in family disputes when expectations are not clearly recorded and family members have differing recollections of what was agreed.
Harry Lambert had a successful career as a private equity specialist when he returned to the family home in 2023 to help care for his elderly mother at his father Christopher’s request, he told London’s High Court.
Before moving back into the house, his father “promised to provide him with long-term secure accommodation,” he said. But he ended up living “on the street” and his father, a retired teacher, changed the locks to prevent Harry entering the house whilst he was out for a run.
Following his mother’s admission to a care home but before she died, Harry was forced to leave, he told a judge, and is now in a council-run HMO flat, where he says he can’t work because of his living conditions.
He is now suing his father for a portion of the wealth acquired by his parents, claiming that his mother left assets valued at around £2 million, and to force his father to let him return to the family home.
But his father, who inherited all Mrs Lambert’s money on her death, disputes the amount Harry says the family fortune is worth and denies making any promises that his son would be financially “looked after”.
Judge Richard Farnhill heard Harry claim that his father turned against him when they clashed after Christopher sold one of the family’s properties without sharing the profits with his son, as he had allegedly promised.
Harry insists that by returning home he had lost out on earnings, given up a solid tenancy and contributed towards household expenses while helping to care for his mother and was assured that he would be financially “looked after” in return.
In June 2025, Harry’s mother, Maureen, was admitted to a care home, and soon afterwards his father changed the locks on the family home. Maureen died the following month, leaving her entire estate to her husband in her will, the court heard.
Harry claims he ended up temporarily living “on the street” before moving into his current HMO accommodation.
He told the judge: “I want to be back in my house and in my bed where I was living for 20 months and which has been my family home for 40 years.
“I’m now living in an HMO flat in Dagenham with no WiFi and so no ability to do a job which relies on having access to the internet.
“I’ve not been earning and I’ve been on universal credit, I’ve been reduced from an earning capacity of £100,000 per year to being poor.
“I can’t even eat most nights.”
Harry is seeking a court ruling that he is entitled to a 50% share in the family home as well as bringing an estate-wide proprietary estoppel claim over family assets.
His father’s failure to share the profits of the sold property “caused considerable friction between Harry and his father, and soon after that happened their relationship started to break down,” the judge told the court as he sketched out Harry’s case.
“In February 2025, his father told Harry to leave the property, but he didn’t do so. Over the next few months, Christopher Lambert installed locks on the internal doors, excluding his son from areas such as the kitchen.”
With the trial of Harry’s claim on the family money pending, his case reached court as he applied for an interim order allowing him “exclusive” use of the house, with his father having to leave, or an alternative order requiring his father to fund his accommodation to the tune of £3,500 per month.
“I’m asking for reinstatement into the property and my father’s exclusion, as we cannot co-habit,” he told the judge.
“He hasn’t been in the property most of the time, he has been abroad travelling, but my fall-back position is that he should fund temporary accommodation for me until trial.”
Barrister Mina Heung, for Christopher Lambert, argued it would be “draconian” if he ended up being barred from his own home of 40 years and dismissed Harry’s argument that his father can go to another property he owns.
Branding Harry’s application “intrusive,” she argued: “…he seeks not merely to enter the property, but to occupy it as his sole or primary residence and exclude his father from his own home.
“The parties’ relationship has broken down seriously,” she continued.
“Harry’s own evidence refers to family conflict, police involvement, non-molestation proceedings, allegations of criminality, lockouts, deadbolts, safeguarding allegations and disputed financial matters.
“A mandatory order placing Harry back into occupation while excluding the legal owner will be highly likely to generate further disputes and applications.
“Harry says his father can live at Cheyne Court or has been abroad. That is not an answer.
“The alleged availability of another property does not entitle him to occupy his father’s home – nor does his father’s travelling abroad from time to time mean the property is abandoned.”
The barrister also said Christopher “denies making any clear, binding or irrevocable promise giving Harry a proprietary interest in any property or asset”.
Ms Heung confirmed outside court that it is part of Harry’s case that his father changed the locks on the house after he left for a run.
After two hours in court, the judge refused Harry’s application to exclude his father from his property and move back in, also declining to order that he cover his son’s rent.
However, he directed that the trial of Harry’s wider claim should be heard as soon as possible and said he should be given access to the family home to recover what he claims is property worth tens of thousands of pounds.
Kate Harris said of the case: “Adult children often make major life decisions, such as giving up employment, relocating, or providing care for elderly relatives, in reliance on what they believe to be promises about future financial security or inheritance. Difficulties arise when those expectations are not clearly recorded and family members later have very different recollections of what was said.
“One of the key lessons is that families should not assume that good intentions or verbal understandings will avoid future conflict. Where a family member is providing care, making financial sacrifices, or giving up independent accommodation, it is sensible to have open discussions and record the arrangement in writing. This can help manage expectations and significantly reduce the scope for costly disputes later.
“Perhaps most importantly, this case serves as a reminder that family disputes are rarely only about money. They often involve issues of care, dependency, housing and long-standing family relationships. Early legal advice, clear communication and careful succession planning remain the best tools for preventing disagreements from escalating into public and costly court proceedings.”
Image courtesy of Champion News
