Asked for a gluten free menu,the starter had to be taken back(by server) to check if it was in fact gluten free!!. When the main came ..burger in a bun. I checked that it was a gluten free bun,they took it back,checked and came back with it saying it was but I knew it wasn't so I mentioned it again,she took it back,2 mins later it was brought back with a different bun. I asked if they'd just changed the bun. She said No its a completely new burger,etc. So it was eaten. Afterwards it was obvious that it wasn't. I was ill all night with obvious gluten intact albeit minor. This could have been a more serious issue and not just a dodgy tummy!! Server was lovely by the way,not her fault at all.