It seems Ryanair have form for this

Couple Boards Wrong Ryanair Flight 'Home', Ending up 800 Miles Away

I posted on a similar story in February and I'll have about as much sympathy for this couple as I did back then

A British couple boarded a Ryanair plane back to Stansted airport from France - only to realise shortly before landing that they were on the wrong flight.
In fact, they were descending towards Madrid, some 800 miles away from their home in Fulham, London.

It beggars belief that someone can go through an airport and end up on the wrong plane, but it's also a little surprising that Ryanair can allow it to happen (twice), what with all the checks people go through

It eventually took the couple five hours to get home after getting a different flight out of Madrid.

They say they have have tried to contact Ryanair since, but with no luck.
A spokesperson for Ryanair said: “Mr Jezequel and Ms Mallia boarded their flight from Marseille to London Stansted through the correct gate.
“However, these passengers then failed to follow the allocated route to the aircraft departing for London Stansted, crossed an unauthorised area and wrongly boarded a flight departing to Madrid.

Unfortunately I'll be flying Ryanair in a couple of months (I had no choice). I doubt me and Mrs Bucko will end up another hapless couple in the wrong country, but due to my fear of flying, I do like a few pints before I get on a plane

I'll have to be extra careful