Was chatting about running multiple chains to reduce maintenance in another thread, spotted today Chain Reaction (and Wiggle) have a really good deal on KMC 9 speed chains at £8ea right now:
https://www.chainreactioncycles.com/kmc-x9-93-9-speed-chain/rp-prod12756
Halfords have price matched if you prefer them
I use KMC Z8 chains as my bikes are mostly older, very decent chain, bought a whole bunch of them off Wiggle for £4 ea last year, they are still only £6 at CRC now
https://www.chainreactioncycles.com/kmc-x9-93-9-speed-chain/rp-prod12756
Halfords have price matched if you prefer them
I use KMC Z8 chains as my bikes are mostly older, very decent chain, bought a whole bunch of them off Wiggle for £4 ea last year, they are still only £6 at CRC now