My chains were far cheaper than £200 (for aftermarket Febi chains), more like £80 for the pair, but I'm not sure that the shorter oil pump chain is still available from Febi? It's the ***ociated gubbins that racks up the cost... the bits that you can only usually get from Honda, such as tensioners, tensioner arms/slippers and guides, etc. The lower tensioner alone cost me £155 from Honda, even with the forum discount.
But if you can get a whole kit for £200 then great! But is that just a cam chain replacement kit though? While the very long cam chain is usually the one that gets noisy, it's often the much shorter oil pump/balancer chain that snaps and wrecks the engine.
If your car is a pre-facelift model then it may just be a tensioner that's failed (the early ones were a bad design which were modified for the 2006 model). If you're lucky and it's the cam chain tensioner then this can be fairly easily replaced through an inspection cover on the chain cover. The newer tensioner design is a straight swap for the older (ratcheting) type.