The first part of the United Kingdom Doppler campaign was carried out in 1976 and involved 13 stations of the primary triangulation network of Great Britain. These were supplemented in 1978 by observations carried out by Decca Survey Limited on seven additional stations, thus covering the whole of the OSGB Network. The observations were processed in the single point positioning mode with both the broadcast ephemeris and the precise ephemeris. All of the data were processed with the use of programs developed at Nottingham. Moreover, and for the sake of comparison, a small sample of the data was also run with several commercially available programs. The analysis of the results indicated some significant discrepancies between the geocentric coordinates obtained by using the two types of ephemeris. These differences were confirmed by similar comparisons carried out on a continental scale. The paper is concluded with practical suggestions aimed at helping organizations processing Doppler data with only the broadcast ephemeris.