Re:Stone Arch Bridge
Like it Ade - gives a new slant on joinery tools! I googled Celcon and came up with B&Q but their Irish web site takes you straight to the UK one. However, Quinn (who make cement, glass, insulation, roof tiles (i got some shipped when I took my roof off), have health insurance - took over from BUPA over here - and car insurance) also make their own blocks called Quinlite. So its just a matter of finding some!
Mick