Today I had a harmonic damper fitted by a local garage to the rear subframe (see golfdave's how to guides) thanks to @Ceefeesh who sold me his unused part. I was sceptical about it's ability to quieten the car but actually, it does seem eerily quiet inside now and I'm pretty sure I'm not imagining it. Less rumble coming from the back. I'll see what my OH thinks next time we go out but so far I'm impressed.
Next I fitted an inlet manifold cover, this time thanks to @wantmygti. Tidies the engine bay up a treat!
Finished the morning off by utilising the GTI's practical side - a visit to Homebase to collect 10 bags of slate chippings....