What is interesting to me about this incident is that alot of ATC complain or don't like all the extra VFR or non standard flights etc in already busy airspace. So why issue a go around to Number 1 which keeps him in the air for longer, dosen't reduce your workload any less and adds to your already busy circuit?
Who is easier to control? The student pilot who may or may not be quite sure of the procedures and aircraft capabilities...or the jet traffic with 150 fare paying passengers on board being flown by a pilot who has a few more hours in flying time and hopefully a bit more awareness of the situation (that ATC should have told him about).
Lessons to be learnt by ATC in this aswell....those flight priorities don't always apply if it is easier to get someone on the ground where they will be safer and out of the way.