The son of a multimillionaire car boot king who was not left a penny in his father's £5million will is fighting his stepmother over the family fortune.

Richard Scott - who died aged 81 last June - ran the UK's second biggest boot fair from his 'vast' Cheshire farm, where ITV's 'Car Boot Challenge' was filmed.

Mr Scott's eldest son Adam Scott, 56, says he worked on the farm side-by-side with his father from the age of nine, and was promised it would be his one day.

But after Richard Scott remarried in 2016 to Jennifer Scott - a woman 28 years his junior - he wrote his son out of any share of his estate.

Instead, he left Jennifer in control of his millions.

Now Adam is fighting his stepmother, who is two years younger than him, claiming his father was not in his right mind when he signed his two final wills.

But lawyers for Jennifer claim that Richard knew what he was doing when he disinherited his first born and that Adam's relationship with his father 'completely broke down' after he tried to get his father sectioned.

Judge Nicholas Caddick QC at London's High Court was told by Mr Scott's lawyers that the Scott family have been farming in Cheshire for around 300 years and 'traditionally passed the family's farmland and business down the generations'. 

Mr Richard Scott's first wife, Adam's mother Janet, died in 1976.

In 1994, Mr Scott began his 24-year-long relationship with Jennifer, finally marrying her in 2016, around two years before his death.

By the time he died of cancer last June, he owned 'a huge quantity of land' around Chelford, Cheshire, which made up the bulk of the £5million which passed into his estate.

Adam's lawyers told the judge that he spent over 40 years helping his father run the 'vast, sprawling' farm and managing the car boot sales he held on part of it.

But in 2016, just months after his second marriage, Richard signed the two wills which disinherited Adam and left Jennifer in control of his wealth, as executor and a major beneficiary.

Jennifer's two sons, Gordon and William Redgrave-Scott, and Adam's sister Rebecca Horley were also made beneficiaries of the last wills.

Adam is now challenging the validity of those two final wills on the basis that his father lacked mental capacity at the time they were made.

He is also bringing an alternative claim for the farm, saying he relied on his father's promises that he would inherit it and sacrificed his chance to make a life for himself elsewhere as a result.

His barrister William East said: 'Adam began working on the farm aged nine, when he learned how to use the potato harvester.

'Throughout his childhood, Richard encouraged Adam to involve himself as fully as possible on the farm.

'Adam would help out on the farm whenever his assistance was required...he assured Adam he would one day take over the farm and the family farm business.'

Adam Scott worked on the farm throughout his life for little or no pay, often 100 to 130 hours per week and without holidays, the barrister said.

And he gave up a more lucrative career as a kitchen designer to work side-by-side with his father at his request, he claimed.

'He continued to work with his father under these conditions because of his understanding that the business and the farm would one day be his own,' Mr East said.

Mr Adam Scott insists his father 'lacked capacity' to write him out of his will by 2016, because of an increasingly severe degenerative brain disorder which was causing him to 'act strangely', he continued.

But Rory Brown, for Mrs Scott, told the judge that Richard had fallen out with Adam on reasonable grounds.

'Adam was excluded by his father from the farm in the context of their falling out after he tried to have his father committed on the basis that he lacked capacity,' he said.

'There is very good evidence that there had been a total breakdown of their relationship, and that was a situation which continued up to Richard's death.

'At the end of Richard's life, there were difficulties between him and Adam. Adam was told not to trespass.'

He added: 'Jennifer is the widow of the deceased and was his partner for 25 years and was appointed the executor of the estate. There are lots of beneficiaries with an interest.

'The farm is in the estate and Adam was excluded during his father's lifetime. Jennifer is in possession of the deceased's parts of the farm and is farming them as executor.

'The farm is sprawling. It's vast. It's a huge quantity of land up in Cheshire. This is an estate which, on an interim account, is worth £5m.

'This is a family disagreement over the farm which has got out of hand.'

Mr East, in response, accepted that medics went to the farm to assess Richard's mental state after 'Adam contacted Richard's doctor and the authorities to discuss the risk Richard was beginning to pose to others'.

But he insisted that Adam did so only after Jennifer had 'called Adam for help'.

The family appeared in court for a preliminary hearing, after which the judge granted Mr Scott an interim injunction, barring Jennifer, Gordon and William from 'trespassing' on parts of the farm which are in the estate, but over which Mr Scott still holds tenancies.

The alleged breakdown of Mr Scott's relationship with his father 'is in dispute', the judge commented, adding: 'Adam says he was farming his father's land up to his death.'

The full trial is now set to go ahead later this year.

The judge concluded: 'I'm very keen that we should have a speedy trial. This needs to be resolved as soon as possible.'

Last year Mrs Scott was charged under dangerous dog laws after her pet savaged a policeman called to the farm near Knutsford by her estranged stepson.

At the hearing her lawyer said: ‘It is my thinking he wants some part of the inheritance. He lives across the road from the family and is constantly calling the police trying to report them.’

She was ordered to pay damages to the officer – who suffered puncture wounds to his leg – and was given a full community order and curfew.