Pargetter

From today's Times:

"The family comes and go, the boys attend school, though Gary, a self-employed pargetter, is not working."

What on earth is a pargetter?  I'm struggling to find a definition on the web.  Is this a typo, and if so, for what?!

http://www.timesonline.co.uk/tol/life_and_style/health/features/article1812669.ece

Updated 2007-10-07 - We have an answer!