Mr Bloggs -
Mistakes can and do occur in ALL large and complex organizations which are run by human beings; Manchester Airport is no exception. It is one of the reasons why runway inspections are deemed necessary and are carried out regularly. Is it not more constructive to acknowledge the professionalism of those who spotted this problem before safety was compromised? I do not have first-hand knowledge of whether this particular hole was spotted by airport ops staff or aircrew, but well done either way. And as for fuel wastage, this is regrettable, but would you rather depart from an unsafe runway or burn some extra fuel whilst necessary repairs are carried out? Every airport makes mistakes; the good ones rectify them before safety is compromised.
Unserviceabilities - especially during WIP - are inevitable in any airport operation. Let's keep matters in perspective please.