I can't see a situation where the F35 number would get past 24. That's probably the maximum capacity where the junglies can remain on board. In most scenarios you are likely to want that RM capacity too.
And let's put this in context. The UK hasn't been able to put much more than 16 fixed wing aircraft to sea for over 30 years. I don't think CdG will carry much more than 24 - particularly rifrafs.
A task group built on those numbers, and with an LPD and 2 LSDs in company, will not lack capacity to deliver death and destruction for UK plc.