Hi Tammy. I shall try the mustard tomorrow with my fried egg sandwich! Thanks for the tip and thanks for the prayers - I appreciate that.
Hi Ellen - thanks for suggesting it might be oral thrush - I hadn't thought about that. I've had a problem with that before, caused by antibiotics, so I've already got some pastilles for it. I'll give them a try.
I teach English as a Foreign Language. These days I'm partly retired but teach just a couple of groups at home, so my students come to me and I don't have to go out, which is great in my present situation. Most of my students are au pair girls and boys who come to the UK for a few months to learn English. They're delightful young people in their early twenties from different European countries - France, Slovakia, Czech Republic, Poland, Hungary etc.
Best wishes everyone and take care