14CFR only referes to "instrument training" and "authorised instructors".
Probably though because the FAA has no concept of non IR'd or non "IRI" instructors teaching for an instrument "rating" (there is also no concept of an non instrument, instrument type rating under the FAA).
It is a very complicated issue and it is better to be safe than sorry. I "failed" my IR test before we even got in the air because I was missing 3 hours of night flying.
You could claim to an FAA DPE that Compton Abbas to Henstridge was a cross courntry flight and he'd probably believe you....technically under the FARs it is not, and later on I guess it could come back to haunt you (very unlikely of course)......