21 Secondly, and compounding the defendant's failure to comply with orders, was the cavalier disregard the defendant or his solicitors had shown for those orders. The defendant had undertaken to provide to the plaintiff's solicitors by mid-June some details about the nature of the expert evidence. There was no order to that effect, but an undertaking such as that should be honoured. If it is not honoured, there should be some explanation as to why it is not honoured. Again, leaving to one side professional courtesy, honouring such undertakings allows the system to work effectively. A failure to honour such undertakings undermines the co-operation between solicitors which is essential if cases are to be handled expeditiously. Moreover, at no stage had there been any attempt to explain why the expert evidence had not been provided. No attempt was made in the correspondence to offer an explanation; nothing was put on affidavit in response to the plaintiff's chamber summons. Rather, what was filed was a late affidavit which was of no assistance whatever. Finally, there was the document purporting to comply with the expert evidence order. It is not worth dignifying that document with even a superficial analysis of its failings. It should never have been sent to the plaintiff's solicitors and it should certainly not have been put before the court.