The CBIR is unique in offering a route for experienced pilots with a past history of instrument flying to train for the full Instrument Rating (IR) in a way which reflects their experience. This is in sharp contrast to the normal commercial route to the IR via a modular or integrated course, where no prior experience is assumed. For the latest on ATOs that conduct the Competency Based Modular Instrument Rating (Aeroplanes).
Simply look for Standards Document 31: Organisations Conducting Approved Courses of Flight and Ground Training
Names and details of all ATOs approved by the UK CAA to provide the CB-IR can be found in this document.