In yesterday's Daily Mail, in their short articles column, there was the following article. I know this may open up the old chestnut again (but I am NOT posting to do that!!! - it is just for information as many won't get the Mail. It doesn't specifically mention AF but of course that is covered by heart conditions as would faulty or replaced heart valves, etc.
Nearly a third of older drivers are at risk of invalidating their driving licence [and therefore their insurance] by failing to inform the DVLA about a medical condition such as diabetes or epilepsy. Around one in ten drivers have a condition they should declare. Other examples include sight problems or HEART [my caps] conditions.