30 hours ground training and 15 hours flight training plus an Assessment of Competence is the CAA recommendation taken from CAP 804 Section 4 Part Q Subpart 2. The training
can be reduced further at the discretion of the ATO/CAA. Some information here:
Flying Training|Instructor|Examiner|Formation|CPL|Aerobatics
If during the training course the Head of Training of the ATO determines that the training may be reduced to less than the minima quoted the Head of Training may make a written recommendation for a further reduction through the UK CAA Licensing Standards Inspector assigned to the ATO
ifitaint...