"The examiner should also check.... FRTOL...Course completion certificate ..etc.
There is no such thing! And no EASA requirement for one.
There FRTOL is a UK National licence, nothing to do with EASA, and does not have to be conducted or completed prior to any skill test.
the test now has to take place at the course completion, ie a minima of 45hrs.(CAP 804)
Put another way, the Examiner has to check that the candidate has comnpleted all the items for licence issue (i.e. minimum of 45 hours) before conducting the Skills Test
Despite there being no requirement to have passed the UK FRTOL practical, the candidate is still examined in "ATC liaison" as part of the EASA Skill Test and technically could be failed on those sections.