Borbus
It took a while to figure this one out but I think have. Basically St Andrew's Business Park seems to be the old site of St Andrew's Hospital (Norfolk Lunatic Asylum). The sign is actually on the north side of the roundabout and it seems that part is called "Northside". Archant Print has this in its address on the website (not Broadland) as does Bannetynes and all the others. I think a brochure with Archant listed on Broadland must have been a mistake.