Aero, I understand your dilemma and of course legally a localiser only would be a non-precision approach, so here's another grey area. However, as it isn't going to be your day when all this happens I personally plan as topbunk suggests and use the non-precision minima assuming ILS is off the air completely.
Top Bunk it makes sense, and as far as I'm aware that isn't just your company but any company operating under JAA regulations that has additions.
Sanket, you don't understand the question. There are rules laid down under JAROPS for what minima you must PLAN on for a "destination alternate." Briefly, if my destination alternate is CAT 2 or 3 capable, my planning minima is CAT 1. If it is CAT1 capable, my planning minima is non-precision minima. If it is non-precision approach, my planning minima is non-precision plus 200ft/1000m. Circling approach, planning minima is circling minima.