The solution of course is to make the conspicuity code 1200, like the sensible Americans. Shows that the original selection of 7000 wasn't thought out properly in the first place.
Indeed, IIRC conspicuity in the UK used to be 4321, before it became 7000 in the early nineties, one of the early euro-harmonisations, was changed so as not to upset Paris Centre who used it for IFR traffic in their FIR.