The message
from "Graham Dixon" drop the bomb to
reply contains these words:

I wanted to buy one of the commercial worm composting systems but found the
price 'prohibitive' (notice I didn't say 'Rip-off')

I gave it some thought and came up with thIt cost thirteen quid to make.

http://www.troubleatmill.com/wormbin.htm

Spendthrift; my version cost 99p :-)

Janet.