that's correct, with push button start, leave clutch out and press start button, to accessories and again to on. With the DIT engine it should leave 20-30psi of fuel pressure in the line for starting, so theres no real need to wait till the fuel pump primes... this is my 3rd WRX and the others haven't had this problem. You shouldn't need to wait etc.

Car has been refuelled on BP98, and runs smooth and idles fine, hardly notice its running.

Just a note on the priming the fuel pump too, I had tried that and makes no difference.

If you google - 2015 WRX hard start. people in America are having very similar issues, very limited but... one guy had his base model replaced for a limited too!

Thanks for your input