I'll Leave The Door Open

Had planned to photograph some flowers I had been given for my birthday, but T called to come down to the greenhouse.  This butterfly had got himself shut in there.  He was settled on the roof quite happily.  When he folded his wings the underside was a much lighter brown.  The nearest I could get to an identification is either a Wall Brown or a Speckled Wood.  The flowers will wait for another day, couldn't miss a butterfly I had not seen before.