As folk who follow or are involved in the Swift project, we are keen to encourage the installation of Swift bricks into new build housing and the like, to compensate for the loss of Swift nesting apertures in the eaves of older properties which are increasingly being improved with UPVC soffits. There is an interesting leaflet on the construction and use of these bricks which is now viewable below. Click within the image and you can scroll through it. Hit the black ‘pop-out’ button top right and you can view in Google Drive and download it.