In my local builders merchant today looking at flooring, and they had a rather nice engineered board at a good price.  The difficulty is that this particular board has a 'clic' fitting system, making it unsuitable for bonding to our concrete slab.  I have always been under the impression that the best solution with timber flooring over (wet) UFH was to bond it down with a flexible adhesive, however, floating a 'clic' floor in conjunction with the appropriate underlay does appear to be another (a