Thanks to Imogen.
Like others, I found this mostly on the gentle side but a few tricky ones nonetheless.
Have never heard of 22d and even when I worked out the letters from the wordplay I still had to check it was an actual word because, let's face it, it doesn't look like one:-)
Still a few queries with regards wordplay...
13d - why "As" chemist and not just chemist?
Also, I can't parse 16d and 25a despite being sure of my answers.