I couldn't find any Signal in Tesco tonight - it seems to be getting quite hard to find. I hope they don't discontinue it, I'm too old to change my toothpaste. What kind of toothpaste do you use?

I passed my second IAQ exam today - Crest Settlement. I have to do one more to complete the qualification and our training department is organising 3 courses. Which of the following should I do?