This is inaccurate, as experience gained in any SEP will count
The reference that you quote states that
"....the CAA considers that all hours flown in the specified capacity in any aircraft of the relevant class/type using the EASA licence may be credited". I understand that you may interpret this as including flights in Annex II aircraft (assuming that the UK CAA makes EASA licences valid on those aircraft) but this is not the view of EASA. Some changes were made to allow for some Annex II SEP experience to be accepted for the LAPL requirements but this did not extend to other licences and ratings. With that single exception, the basic premise remains that Part-FCL relates
only to EASA aeroplanes, as stated in the Basic Regulation.