67 On the other hand, I accept that the defendants have been prejudiced by the continuing uncertainty over the fate of the tenements and that that will be the case while the plaintiff's proceedings for leave remain unresolved. The evidence does not permit any firm conclusions to be drawn as to the actual extent, if any, to which work in respect of the tenements which would otherwise have been done by one or other of the defendants was curtailed, but, in my view, the state of continuing uncertainty brought about by the lack of finality in these proceedings is itself a form of prejudice. It is also the case that the quality of justice tends to deteriorate where there is excessive delay and that there may be indeterminate, but nevertheless significant, adverse effects arising simply from the passage of time, as documents become more difficult to locate or keep together, and witnesses become more difficult to locate and their memory, and their willingness to assist in the litigation, tends to fade.