The other context here is the insurgency of Reform UK.

"He wanted everybody to know. So this is great, because it's letting people know."He carried the baton for as long as he could, and then when he couldn't carry it any more, we've taken it on for him."

Ian's wife, Catherine, was also there supporting the swimmers, hoping for "a world free of MND".She said, when people were diagnosed, she wanted doctors to be able to "just go bang, here is a jab... so that sufferers are all fine again"."I would love that to happen," she said.

The conditions for the swim couldn't have been better - the water was flat, calm and shiny, like glass. The sun was out, for once, and it felt glorious.It is estimated to be about three miles (5km) from point to point but, with tidal conditions, it took us just shy of 4 miles (7km) as we swam in the shape of the letter C.

As I slid through the water, I could see aircraft heading into Southampton Airport and yachts, boats, ships and ferries criss-crossing the busy stretch of water.

Safety was paramount - everything had to have the clearance of the harbour master and my pod had to stay together as we crossed the busy shipping lane.Jayden, 16, is a beneficiary.

He started carrying a knife when he was 12 after a group of 20 boys started on him in a park in Coventry. One swung an axe at him."Ever since then I didn't step outside without a knife," he tells the documentary. "You're going to be scared after that, aren't you?… You're going to want to protect yourself some way and that was the only way I could think of."

He was eventually referred to the Community Initiative to Reduce Violence (Cirv), which is operated by West Midlands Police.They identify teenagers who might commit or become a victim of knife crime and intervene before a stabbing takes place.