Yes Weapons Hot, you do use the phrase "into position and hold," in place of our "line up and wait." Both seem to me to be pretty well understood and unambiguous, but in the US aircraft are often cleared to take off well before they reach the hold, and I've even been cleared to land prior to reaching the FAF. These are practices I personally disagree with, although admittedly they mainly occur at less busy times.
Re using localiser to confirm correct runway - I was taught to do this for ALL night, Low Viz and Intersection departures, and at any time you could not actually SEE the r/w number as far back as the 1980's, and I am surprised this is not SOP for ALL operators, and FTO's.