I did my NQ as part of my PPL and was told the same thing, apply for all at the same time (PPL, RTOL & NQ) and you won't pay extra. I tried it some years ago now (went there in person), didn't work!!! They wanted another £70-ish(?) for the NQ addition, but as someone else said, the RT ops licence is free if you apply at the same time.
Worth a try though!