About four fifths of the members on the leaked BNP list are men and the most common names are John, David and Paul. Those three names accounted for just over 1,000 of the 12,801 names on the list. Susan was the most popular female name.

The postcode with the highest number of party members was NG16 – in northwest Nottingham – with 57. Among the more common professions listed by members are electrician, security consultant, former serviceman and IT specialist.

The data on the list was scrutinised by The Times, revealing a clear picture of the geographical spread. Two hotspots of membership emerged, around Leicester and Birmingham. The list was divided initially into postal districts, of which there are more than 2,000. About a quarter of the 2,166 postal districts in which registered BNP members say that they live had only one member. Only 20 had 30 or more.

Cross-referencing the list with socioeconomic data proved even more fruitful. According to analysis of the list by the Dr Foster health consultancy, which used social deprivation data from the Office for National Statistics, only 5 per cent of the party’s members live in areas with high Asian populations and only 2 per cent in areas with larger Afro-Caribbean communities. Eighteen per cent are from white working-class areas.

The analysis also shows that BNP membership is higher in areas that have average or above-average deprivation. As opposed to the 22 per cent of BNP members who live in areas with above-average deprivation, only 16 per cent live in the least-deprived areas.

About 1,000 BNP members described themselves as “activists”, including one who noted that he or she made “kites with BNP logos etc” and another who specified “discretion requested”.

After John, David and Paul, the next most popular names are Michael (330), Robert (262) and Peter (261). Susan was 51st on the list.

Individual bubbles do not signify addresses or postcodes. They broadly identify postal districts.

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