32 The difficulty which arises is that of evaluating what risk, if any, greater than the risk inherent in any ordinary flight of stairs, is posed by a step which requires an individual to step down through a distance greater than the usual height of a step, but onto a landing considerably wider than the usual width of a step. The exercise becomes even more difficult when one is attempting, assuming that combination is regarded as a dangerous one, to evaluate whether it would be rendered more or less dangerous, in circumstances where that landing abutted a roadway, or laneway used by delivery vehicles, by decreasing the height of the step if at the same time that alteration involved decreasing the width of the landing. In simple terms, the question becomes whether, given that a risk of falling involves a risk of falling onto a laneway used (how often is not clear) by vehicles, it is more dangerous to have an unusually high step, coupled with a reasonably wide landing, or to have two steps which are not as high, but which involve a shallower landing? There is hypothetically a third possibility, which is that it might be possible both to preserve the width of the landing and to create shallower steps, but that does not seem to have been done in modifications in issue in this case, and there was no evidence about the configuration of the premises from which it would be possible to tell whether that was a realistic possibility or not.