Commuting to work by bike

There is a nice thread about commuting to work by running, and there are loads of terrifying threads about bikes and cycling which are about carbon and grams of weight and lycra - not this one: how to dry your kit, how to carry/store your work clothes etc. and some bike specific stuff about best mudguards to minimize wet and dirt and maybe some stuff about cycle paths, safety, simple bike maintenance etc.

And if you declare yourself at the outset as:
A. Total bike head, train lots, do bike races/triathlons and the commute bit is just a way of getting extra miles in and is done at full bike training pace.
B. Bike for fitness (either with running as main sport or not) and like to do bike in lycra, at reasonable speed, certainly always shower necessary!

C. Bike is firstly a mode of transport, essential for the commute, sure a bit of fitness is good, but it's secondary. Safe, reliable and clean are the priorities.

G