Its also relevant to note why ATC want the report. There are two reasons:
1. Its a mere memory jogger for them to issue the GP decent clearance and prepare for the final clearance to land or touch and go.
2. If you don't intercept the localiser you're going to need another type of approach. This should be clearly apparent from your track on-screen.
Henceforth a LOC est. report isn't necessary at all if the frequency is very busy!