After taking degrees from Cambridge University (MA, 1962) and Columbia (MSc,1964), Christopher joined Reuters and worked as a correspondent in Algiers, Buenos Aires and Lima.

After a short spell in the City of London (SG Warburg, 1969-1970), he built Latin American Newsletters into the leading source of political, economic and business news from South and Central America.

In the 1980s, he changed course and founded a succession of technology-based companies: first, Logotron, which became the leading supplier of Computer Software to schools; then the Longman GeoInformation Group; and finally Landmark Information Group. All three companies were pioneering and all are still trading.

Following the sale of Landmark (2002) to the Daily Mail and General Trust (DMGT), Christopher became an independent investor and non-executive in a series of start-up companies, including Allegran Limited, where he was non-executive Chairman of the team of Directors that included Adrian Tear. Like Landmark, Allegran was also later sold to DMGT.

Christopher is still a non-executive Director of Landmark and has served on a number of other Boards. He was also, from 2003-2008, an expert member of the Advisory Panel on Public Sector Information (a non-departmental statutory body). He also served for three years on the Council of the Association for Geographic Information.