Have you registered and signed into BBC iPlayer? You need to register with iPlayer and, once you have logged in, you will be asked to either select the use of Flash Player or HTML5. That choice will remain in memory. My iPad could only select HTML5. There is a very cute video to play as an example. Use this link:- account.bbc.com/https://account.bbc.com/signin
After listening to Catch-up of The Archers for years in my laptop, I can do so no more. I get a message saying I have to download Flash Player or enable it in my browser. I have done both, to no avail!