If served by first class post this is deemed served the day after the day after posting. More usually however Statutory Demands are served personally, i.e. they are placed into the hands of the debtor. This avoids any dispute regarding service.
They also tell us most solicitors are hard to get hold of whereas we’re happy to listen. The reason for this is that we value long term relationships and we’re happy to speak with business people, to invest our time in understanding your business and whatever your concerns are. Only at that point can we understand whether we’re the right people to help you.