Thanks for your replies and yes Colin it looks like it has the stubby screw you mentioned, though it's yet to arrive and can't be 100% certain. I also tightened up one of the top hinges which turned to to be easier that I first thought it would be. I unscrewed the worksurface which was still held by an angled metal plate at the rear but it gave me enough room to access it and tighten it up.