Sorted out a squeek from the fixed drive chain - removed cranks and bb, checked bb still smooth (was fine after 3.5 years of daily abuse), re-greased and re-assembled. Chain given a very good clean and wipe down. Sticky brake cable cleaned re-greased.
Engineered a bracket for son's 'pop bottle' mud flap - great what a bit of bashing a metal bracket with a hammer can do. 'Pop bottle' flap bolted to bracket. If it get's mashed at school, another can be made from the next pop bottle.