Perfect.
Your flock would need to consist of top quality fleece sheep, as those fleeces are the ones that bring in more than £10. You'll need to learn about fleece first - the easiest way to do that is to learn to spin, so you are handling a wide variety of fleece types, and you get to know your trade. A long discussion with someone from the Wool Board would be a good start. Online research will let you see which fleeces are valuable and the sort of prices they will fetch. Take a look at fleece and fleece on the hoof judging at agricultural shows. Selling online is probably the easiest and surest way to find customers. The British Coloured Sheep Breeders Association are usually really helpful and may have members near you who could show you their sheep and sell you some lambs.
Ideally you want cross bred sheep of the finest fleeced breeds, coloured wool being a favourite.
As you can see, this is not a quick fix, as any old fleece will not do. But a bit of research, with lots of fun along the way, would bear dividends.