1 x 33.7mm scaffolding tube 150cm - pullup bar - 20GBP
2 x 48.3mm scaffolding tube 90-100cm - dip bars - 20GBP
2 x 33.7mm wall clamp - 10GBP
4 x 48.3mm wall clamp - 30GBP
buying this off scaff shot is about 90GBP, with 30GBP constituting for delivery! B&Q unknown. this suggests i might be able to get a better price if I shop around in-person somewhere

197cm height is enough for me to deadhang
someone recommended:
5x5 posts, 3m buried 0.8m for pullup bar = 2.2m height pullup
5x5 posts, 1.8 buried 0.6m for dip bars = 1.2m height dip
125cm height dip bar will allow 186cm individual to dip comfortably

so maybe 2 x 2.8-3m posts for pullup, then 3 x 1.8m posts for dips

MK Grid Plus 20A Grid Intermediate Switch White with Colour-Matched Inserts (92060)