Standard Billing Records
This is produced by the 'Communications Service Provider' (CSP, such as T-Mobile), which is essentially the air-time provider with whom the customer is contracted.

This information is derived from the wholesale billing systems of the mobile network operator (the accuracy of which are independently certified by the British Approvals Board for Telecommunications, BABT), which gives the service provider the date and time of each call, the number called and the duration of the communication. The service provider will manipulate this data to meet his own billing format, taking into account any loyalty discounts and customer rates/tariffs associated with any contract.

The customer will receive a bill from the CSP - either in hardcopy or electronic format - illustrating the time and date of each call, the number dialled, the durations for each and the overall cost.

For such material to be produced as an evidence exhibit for court proceedings, it will be necessary for the CSP to serve the submissions with a certified Witness Statement - commonly referred to as a 'Section 9 Statement'.


Call Detail Records (CDRs)
This information is available only from the mobile network operators and shows the information from the wholesale handset bill plus information concerning the routing of telecommunications data/traffic.  Due to the specialist nature of this material, and privacy concerns, such data will often only be disclosed once the CSP has been served with an order of the court or when a bona-fide legal requirement has been identified (i.e. authoritative police service sign-off or following defence solicitor instructions).

This information is fundamental to each and every case where the accurate attribution of patterns of contact between parties is required.  This data is usually distilled or re-formatted to allow the production of 'Colour Coded Sequence Charts' (CCSC) graphically illustrating the peaks and trends of contact, usually overlaid with a time-line indicating other events of relevance (e.g. schedules of surveillance observations or times and dates directly associated with the offence being investigated).

In accordance with the Data Retention Directive, UK network operators hold this information for between 6 to 12 months, meaning that it is essential to make the application for this data as soon as is practically possible.  We are also experienced to comment upon matters concerning legislation including the 'Data Protection Act 1998' (DPA), 'Communications Act 2003' (CMA), 'Regulation of Investigatory Powers Act 2000 (RIPA)'.

Our analysts can assist in understanding expert evidence; ensuring that the instructing party secures suitable disclosure so that adequate case preparations can be made.

ACK EVIDENCE can assist in detailed and comprehensive assessment of telephone schedules, sequence charts, and billing records.  From testing the overall accuracy, through to distilling thousands of pages of evidence into a few pages of empirical statistics that will allow insight into the evidence.