Ok, halfway through. Take all the daylight.
The rear interior panels (would be a door card on a 5dr, no idea what a 3dr is called?) ARE A F******** BITCH to get off. And I broke some grommet things and a bit of the panel - grrr. But am VERY hopeful of what I have done to the rear wheel arch areas. Used a bulk pack of Stinger roadkill which seems ok, not that great. But the acoustic foam seems really good. Will have to see what it sounds like on the road tomorrow.
Still to do: remove front seats, rip up carpet, stick foam thing under carpet and put the seat back.
Also planning to buy some decent mats that might absorb some more sound.