However, rather than Googling ‘flash not working ubuntu 9.04’, I though that perhaps I should try looking at how to get flash working on Ubuntu 9.04 rather than focussing on why it’s not working. My search revealed success via this article.
Fantastic…now the iPlayer is working, I can access the menus in AdWords and Analytics (somewhat vital to my job!) and a host of other great things.
EDIT: the link to the article that solved my problem was incorrect, it’s now updated.
EDIT 2: this did not permanently fix my flash issue. Will update once I find a solution.