HD...
...normally brought onto an intercept heading at about 12DME on radar vectors, to do a VOR/DME procedure as explained by WingoWango. 23L is runway 2 and has an area for turing at about 2/3rds, otherwise it's down to the end to join the loop which can accommodate at best, 4 jets, which all then need to backtrack. Add in departures, and you can see how flow rate is massively reduced.
Runway inspections are now scheduled and require breaks in the arrival sequence - however in this instance the runway had to be opened as an emergency, so it would have been an unscheduled inspection to get things rolling. Lot's of stuff sent to the holds whilst this happened, but not too many diverts. And operating into MAN you should carry 20 mins holding fuel for a no delay approach...
DW.