Excellent article. He spoke eloquently at the e-cig summit in London as well. Posted a link to the article on Facebook in my little attempt to spread the word. Well done James.
He couldn't give advice on frozen storage because as he pointed out - it hasn't been studied, but he also pointed out that nicotine is more stable than the flavourings, how long do foods with flavourings last in a freezer before they lose their taste?