The message
from "Bob" contains these words:

Hi all,

I am strating to make use of some old raised beds thay are 30 feet by 4 feet
wide an 3 feet high - I have repaired the brickwork but have a question.
I have removed all the soil and have found a layer of crushed rock, should I
line the structure with polythene and make draine holes in the bottom or
just pile in a mix of soil, potting compost and rotted manure. I have also
laid on water to each so that I can install a trickle hose in each.

There's no need to line it. The crushed brick is to let rain drain out.

Janet.