I’ve done some Googling and after reading various debates about the dangers of soy, have decided that a small amount of fermented soy is not going to do me too much harm. I chose organic tamari soy in the end because it contains no additives and is wheat free, plus it’s easily available in the supermarket.
You can also buy coconut aminos as an alternative. If you Google “coconut aminos uk” there are a few on-line health food stores that sell it. Here are a few that I found, although I haven’t purchased from any of them:
Another option is Vietnamese fish sauce. I have found an additive free version called Phu Quoc and I buy it from here:
Wai Yee Hong
You can also get it from Amazon, but I found it to be more expensive.
Obviously all of the above will alter the flavour of your food, so perhaps try them all and decide which one you like best!