Roy OxladeAlison Jacques Gallery, London★★★★☆INITIALLY, to the casual visitor, Roy Oxlade’s paintings may appear messy, formless and indecipherable. They might be excused for thinking he had no training at all in the art of painting. The shapes appear random, the brushwork artless and the colour schemes unappealing.But given some time with the paintings, spacial relationships begin to reveal themselves, and a scale, which is suggestive of interior spaces.