TOGS have been about for a couple of years now I’d say, though not many UK sellers, I’d fancied trying some for a while as I quite often ride with my thumbs over the bars on the uphill, on longer rides, or on the road to vary my hand position. I get cold hands easily, and broke a metacarpal last year, which only just seems about right, so thought I’d give them a go, and they were a bit cheaper to pick up in the USA while I was there last month.
Had one ride with them and I’m impressed, can use that over the bar thumb position, but actually have some control and leverage on the bars, and brake effectively. And if you don’t do them too tight you can just swivel them out of the way if needs be, though you shouldn’t need to.