I am planning a small wall for my bin store at the Little Brown Bungalow.   I do not really want something completely solid to allow a draught through to keep any smells moving (though brick with header gaps or spaced out soldiers would be one way), so I have been looking at a Bradstone product called Screenwall - which are the traditional performated 290x290 concrete blocks with which we are all familiar. As new, these are eyewateringly expensive at about £50 per sqm, and I