Yes 2012 defender, sorry forgot to mention that in the post

Thanks, it's a 2012 110 utility. My first defender and I adore it!

Does anyone know what size bolt will fit in these captive nuts? They are in the column between the front and back doors, above and below the door hinge bolts. They look like they are m8 like the hinge bolts, but I can only get an m8 in about a...