I couldn't find the reference in the latest re-arrangment of JAR-FCL 1 either!
Nevertheless, the same table is reproduced in LASORS Section F Appendix B Table 1 (pdf page 285 of 684).
The CFE is away on leave at the moment and will reply to me with the definitive answer after he returns; however, another senior CAA Examiner commented:
A 'training flight' implies the instructor acting in his normal capacity and so the flight is dual with the FI as captain. If that's the case then the FI would need to be qualified to act as PIC.