Five registered Bradford sex offenders are among tens of thousands of people across England whose details are stored on internal council databases due to their deemed potential threat to staff, an investigation has found.

Local authorities identified more than 25,000 service users whose details are flagged on registers sometimes referred to as cautionary contacts lists (CCL), designed to warn staff of a potential risk to their safety.

In some cases, authorities highlighted residents' criminal records, history of violence against women, religious fundamentalism and aggressive behaviour towards employees as a reason for their addition to the lists.

Some councils, including Bradford, identified a number of registered sex offenders on their list, while one council added a client to their database for accessing extremist websites.

The data was obtained through Freedom of Information laws.

Here are the local examples of the responses councils supplied when asked to provide details of their cautionary contacts list; - Five disclosure notices at Bradford council were registered sex offenders, while eight were entered under "risk to children/public".

  • Five disclosure notices at Bradford Council were registered sex offenders, while eight were entered under "risk to children/public".
  •  North Yorkshire featured six children under 10 and four aged 100 and over, the oldest being 104, with 608 in total. The gender breakdown saw 80 men on the list compared with 34 women, where a record was made, with 238 marked "do not visit / alone". Some 285 were marked for violence, with 18 animal-related.
  •  Calderdale council recorded 52 separate incidents, including eight ASBOs.
  • Kirklees council recorded 157 in the year to September 2017, including 125 violence-related entries, one "threat to women" and five "mental health issues".