Regaining TMG Class Rating

Only in PPL.

When you have both a PPL-TMG and a SPL-TMG how do you log your hours? Only in the PPL pilot logbook, only in the SPL pilot logbook or in both?

Thank you @MattL. I was staring at the 3 hrs + 20 landings requirement for the LAPL(A) pilot [FCL.135.A(a)(1)] and got into my mind that there had to be similar specific requirements for PPL/SEP(L)‘s. You say there isn’t which is consistent with my failed attempts to find such requirements :-)

Training as required and pass TMG class rating skills test – there are no minimum hours

I’m a TMG examiner and 3-5 hours is normal for people who have not flown TMGs before

Part-FCL question: where exactly do I find the requirements for a PPL(A) pilot with SEP(L) rating to add a TMG rating to his PPL?
Yes, I usually do know my way around part-FCL, but right now I am dizzy from looking – obviously all the wrong places.

Edit: to clarify: my question is about obtaining the TMG rating (hours required etc.) – not regaining as is the thread title.

I have been keeping my TMG class rating valid by having it signed off at the same time as my SEP revalidations. Once my SEP expired once by just one day, the cross-referencing did not work anymore and the TMG class rating could not be extended along with now SEP renewal instead of revalidation, so I had to do an hour of TMG training and the check ride to get it back on my license.

I come across a number of people who have lost TMG ratings as a result of both not being signed up during revalidation. There are a lot of urban myths and misconceptions with TMGs (most common is that it is differences training), not least because it is the only class that can be flown on two different categories of licence. Let me know if you need a TMG examiner and school in UK!