>>2797320So no hunting for you then, and since you're not getting snow, I'm assuming your not in the highlands either (where afaik, you could legally fish without a license - don't quote me on that, though).
If I was you, I'd go for the hippie / esoteric route. Get a small solar panel, a cheap computer and video camera, and document what you're doing on youtube / instagram / whatever. Get the rat racers to pay for your life with ad revenue.
Depending on where you are, you might also be able to get contracts with living history sites. I remember seeing a lot of them in ireland and cornwall which had sheeps and goats for grazing, while obviously not having enough land to sustain them year round. I assume that they pobably had herders come by regularly, and if you're into trad gear, you might be able to set up a horse-drawn wagon and some wool clothes and get a rotation going between four or so sites. Drive your sheep there, larp for the tourists, fuck a few hippie girls on their vacations, then on to the next site.
You'll have a hard time earning enough for retirement, though, so you should probably consider some side income. Shilling yourself and whatever your sponsors want on social media is one idea, as would be making some sort of artwork to sell (to tourists, mostly) and if youc an find a proper tanner, selling sheep's furs. Those are actually pretty expensive, and a good quality one will get you 200-300€ here in Germany, so probably ~200 pounds in England.
Cheese would be another thing, if you can set up a cooperation with someone that makes it.
tl;dr: if you're considering shepherding, get in touch with living history dudes.