J. P. Gilliver (John) wrote:

It also - one of the major disadvantages of the common forms of the
BS1363 one, and for some reason rarely mentioned in discussions like
these - doesn't naturally settle, when unplugged, into a form that's
hazardous to bare feet

When smuggling a phone into a prison it is essential to include the
charger, and given the commonly used hidey-hole the three prongs can
cause great discomfort.

Bill