SIC codes are a standard method to classify businesses by their type of activity, this section is a great way to help you locate similar companies to research or to identify competitors in any particular niche, clicking the links below will take you a list of the longest established companies with than SIC code / Segment of the UK corporate market.
Section U Activities of extraterritorialorganisations and bodies
99000 Activities of extraterritorial organizations and bodies
99999 Dormant Company