I was thinking of changing my line of career to teaching computer
topics to adults in part time further education, ie evening classes
etc. I am London based. Up to now I have been doing the 9 to 5 routine
in an office, mainly as a software developer. I feel I'm getting a
little middle-aged for this, and am finding it increasingly difficult
to keep up with the pace of change in the software development line.
Also, I think I'd like the increased involvement with people that
teaching brings.

Has anyone out there done this?
I don't know where to start.
Can anyone point me to some useful websites or discussion forums?
I don't know, for example, what qualifications one needs to teach
adults.
Does anyone have any general advice?