DaleJoe's painting arrived this morning after its journey from his studio in Montreuil. I've successfully unwrapped it from its many protective layers, assembled it and and hung it on the wall at the turn of the stairs. Yellow might not be the best background, but I like the movement caused by the offset plexiglas if you look at it when descending the stairs.
Later Dale pointed out very kindly that I'd put the plexiglas on the wrong way round. The painting, and this picture are now correct!