On July 22, 2004, the British regulatory agency Ofcom issued a report on Significant Market Power investigations involving British Telecom (BT) and Kingston Communications. Having found that both carriers possessed SMP, Ofcom imposed cost accounting and accounting separation obligations for several services offered by both. For BT, the accounting separation obligation applied to the following services:
- fixed geographic call termination
- wholesale international services
- fixed narrowband wholesale exchange line, call origination, conveyance and transit
- retail leased lines, symmetric broadband and wholesale trunk segments
- wholesale broadband access.
For Kingston, the accounting separation obligation applied to all of the same services except wholesale international services.