OK - but you accept a VFR approach under the hood. You have a qualified and competent safety pilot, who for the purposes of the approach becomes P1 and you get in a bit of currency training at L2K prices. That would seem to work - wouldnt it?
.. .. .. and the waiting CAA official is happy as well isnt he?
Unless you know an IR instructor who's happy to do all this RHS stuff for free, it sounds more expensive than doing it here
If you haven't got an IR you cannot fly the ILS in real or simulated IMC at LFAT unless you're under instruction from an IRI.
If you meet (or better) those conditions, then the CAA won't have an issue - but they, like me, might question how much money you saved in this process*
* Unless you were taking your IRI friend there for lunch anyway.