Hi, coconut flour can be bought from holland and barretts health food shop.
The doves farm brand does do buckwheat flour which is the most easiest to get in the UK. However, they have currently removed all their buckwheat flour from all shops because they had a problem with a batch having traces of gluten in it.
When doves farm do resell the product you can get it in Waitrose, amazon or on the doves farm website.
I would be interested to know if anyone knows of any other brands of buckwheat flour that can be purchased in the UK (shop or website)? My flour is starting to run low and I’m worried Doves farm won’t resell the buckwheat in time.