been really wonderful meeting forum folk so far!
i've updated the original post and follow up post to show whats been taken and also done some price drops to the paid items too.
further items uncovered during my bank holiday junk scavenge. my house is one big parts bin, it seems:
Fjallraven Kanken Backpack - orange - light use with some dirt on its bum £15
Lotus bikepacking handlebar holster / 8l dry bag (more info here) - brand new £10
decathlon hydration backpack (6l) (with 2l bladder) - used once - £5
google home mini (chalk) - brand new in packaging.. unwanted chrimbo pressie - £15
garden gazebo thing 2.5x2.5m - used once for a rainy BBQ and taking up space ever since - free (dibs received)
bottle cages - one black / one white - free
duro 'fixie pop' tyres 24c (pair) - one is moderately worn with skid patches but both have a bit of life left i reckon - free (dibs received)
bontrager hard case tyre 32c (single) - plenty of life left - free
Marin mtb saddle - unused - free (dibs received)
(For photos see google album)