Immy's Dad: they're all standard parts. The only slightly trickier one to get hold of is the 3/4" male -> hozelock, but this is available from
http://www.thewateringshop.co.uk (PN: CLKM075).
The other bits are all available from a good plumber's merchant (as DaaB suggests), garden centre (for the hose stuff, although probably 10x as expensive) or from Screwfix (PNs: 18109, 29086, 35800, 12964).
DaaB, you're obviously a lot luckier than me. Back in the days when I brewed in the kitchen I remember at least twice causing a mini-flood when pipes came off taps as they got warm and more malleable. And my buckets never seemed to be directly below the tap. A jubilee hoseclip costs about 50p - a small price to pay to be on the safe side.
Regarding 'great big brass ornaments', you've probably realised in the short time I've been a member of this forum, that if it aint over-engineered then it has no place in jasonaustin's brewery!!!