Ohhhh dear. I have made an appalling error.

The executive summary:

• I just attempted to cut my own hair with the clippers.
• All was going well but the lead wasn't quite long enough.
• It appears that when I put the clippers down to go and get the extension lead, I knocked the guard off.
• I didn't notice until I started cutting again.

Some of my hair is now very short.

Possibly pictures to follow.