A chain for the trike, which equals three chains.
A set of tyres for the trike, which equals 1.5 packs of two tyres (so was two packs of tyres - I will have four).
No change from £100 for that lot. It's in preparation for my Berlin to London cycle ride next month. I want to minimise the chance of something untoward (chain break, puncture) happening. Current chain has lasted 4,300 miles which is 1,000 more than on the old trike which had a rear derailleur rather than a hub gear so it's clearly having less wear with the hub gear (I still have a front derailleur).