You actually need to include ALL your biometrics appointment details, so you'll have to put down:
- the fiance visa biometrics details
- the previous FLR(M) visa biometics details
- the TOC biometrics biometrics details
If there is not enough room to put it all in the spaces given in section 9, then you can continue on a separate sheet.
However, I'm not convinced that the TOC biometrics needs to be included, as you were not making a new visa application, you were just applying for a change of personal details to your current visa. If you're not sure though, you can include it, just to be on the safe side.