This piece of guttering was only just hanging on.
Imagine if it had dropped on someone's head.

1. Clean off all flaky gubbins*. (*Technical term.)
2. Glue the pieces of cast iron together using Repair Care resins.
3. Paint your guttering. 
4. Stand back with a cup of tea and gaze in awe at your repair. 

If you really want to know the ins and outs, brew yourself your favourite beverage, sneak a couple of ginger nuts out of the biscuit tin...