Never had any of mine done there mate, but have a folder full to the rim of renault spares, parts, accessories invoices etc. Everything I buy from them has an invoice, so even though The AA did all my servicing using genuine Renault Parts - I have more service history than you can shake a stick it.
And to be honest, once it comes out of its warranty period... who gives a sh*t anyway? My Cup clocked 48k last week, and is out of "official" warranty in September this year.
Whats covered under a warranty anyway these days? Most of the stuff on my car ive replaced... not really sure its a Renault anymore apart from the fact its got a Diamond on the back and Im a member here!