DET1 if you really believe
If he had said 'cleared to land 2 miles' fine but not the other way around
the Controller would lose his ticket, I suggest you report to the SMO and seek his advise on anal retention... I presume you are refering to the JSP552 regulation that says, the pilot must be in receipt of a clearance BY 2nms (100% PK answer, well done), and in hanging onto the word "by", implying that 2.1nms = good, keep your ticket; 2.0nms = bad, lose ticket!!!
You are either playing with semantics and trying to be smart arse, or totally overlooking practicality and not asking yourself the reason behind the regulation (which is to give timely notice to the pilot, and avoid them jeoparding other aircraft by continuing the approach but breaking off the approach at a very late stage... I truly doubt 0.1nm would be that significant in this situation?... PAR is a precision approach, OK and I assume like most RAF bases you use RPAR that gives a range readout at 0.1nm intervals? If you are seriously suggesting that if ADC issues a landing clearance to you at 2.1nms (still within regulations) but you are unable to readback and pass the clearance before the range indicator drops to 2nms you must break off the approach, I would sincerely hope not; so presumably are advocating the controller sacrifices accuracy in order to pass the phrase in a particular order simply to comply with the regs. This sounds like a typical CATCS exercise objective; I could understand ATCEB raising this as a minor error, but shocked to hear of a controller losing their ticket on this issue alone.
If you want a laugh, at your own expense, talk to some aircrew mates about it next time you're in the bar?