When Archie was away at university he would often call Patty for reminders on how to make favourite dishes. “He’d say, ‘Mum, what goes in that butternut squash thing again?’ When he was working at the racing yard he decided he wanted to make doughnuts to take in. I said: ‘How are you going to do that?’ But he was determined to make them like Krispy Kreme doughnuts and he figured it out and started taking them in every week.”

Eighteen months after the tragedy the family are gearing up to move house. It has been a difficult decision as Patty says Archie is “everywhere” in their current home. She takes comfort in wearing his clothes. “This is his,” she tells me, indicating the grey sweater she is wearing as we talk. “A lot of my books are in his room so I am in and out of there all the time. But I haven’t changed his sheets yet,” she adds. “I’ll get around to it sometime.”

Meanwhile, she is rightly proud of the cookbook she has created, which also includes a small selection of photographs of Archie: as a little boy; smiling while wearing a stripy chef’s apron; riding his beloved pony and hugging Sura, the family’s boxer dog. A year after Archie’s accident, the family welcomed a new boxer puppy, Dylan, “who found a smelly old sock under Archie’s bed. It now lies in the dog bed.”

A resounding success, the first 1,000 copies of the cookbook sold within six weeks. As well as supporting the Air Ambulance, proceeds will go to the Archie Foundation, which will offer bursaries to young people who might not otherwise be able to pursue a passion for riding.

The accident has changed everyone, Patty says. Gertie has her brother Jamie “wrapped in bubble wrap. She is very protective of him. And it has made me realise, why worry about things that don’t matter? If I am stuck in a queue I’ll think, well, what’s wrong with that? And I’ll smile at the person next to me.

“It can take great trauma to knock some sense into oneself,” Patty reflects. Mostly, she tries to remember “the tremendous fun we had, and to be grateful for all the time we had together. It has recalibrated my focus,” she adds, “and now, like Archie would have done, I try to see positivity in everything.”

You can order a copy of  A Dorset Kitchen: Recipes From a Kitchen Garden for £20 plus £3.50 p&p (postage is free for two or more copies) from adorsetkitchen.com. All proceeds will go to the Air Ambulance and the Archie Foundation, which will support the Archie & Manni Bursary