If we leave without a deal (as is looking increasingly likely) then for travel in the EU, as I read it, one will need to ignore the expiry date (which includes any extra months added on when renewed) and have more than 6 months left before the 10th anniversary of the date of issue!
I've nearly got caught out -I was in the act of booking a holiday for June this year when I noticed something on Martin Lewis's site - my expiry date is April 2020
BUTthe passport was issued August 2009, so using the 6 month left rule, I won't be able to use this passport for a Summer holiday:(
Wonder how many people are going to be very unhappy this Easter, when the airline refuses them boarding (assuming no deal)??