It's good to see that knitwear classic, the Guernsey, revived. Every yachtsman used to wear these and I remember a voyage to the Channel Islands during which I stocked up on the real thing. These too are actually knitted in Guernsey. Other sweaters come in a range of patterns and colours; all made in GB, and using fine wools such as merino, cashmere and yak. I coveted the red Oskar cable-knit merino crew-neck sweater, pictured below - there's a real gap in my wardrobe for brightly coloured knitwear.
The waxed cotton Ansgar Biker Field jacket is made in London. As the name suggests, its style is influenced by the shape of both biker and field jackets, a mix it achieves extremely well. There is also a good range of socks in boot, regular and shooting (for breeches) lengths.
For more information see the website here. As usual, I've chosen some of the items I would go for.