We are back to the UK CAA oddity that the "authorititive document", at any given time, is the one that they want to quote to prove their point.
There are numerous, possibly hundreds, of documents within the CAA that contradict each other. This gives them the opportunity to select whichever document they wish to quote.
In this case it's the oft incorrect publication "LASORS", in which section B1.4 holds holds the following, quietly embedded within a larger paragraph.
Students who are seeking to obtain a
UK issued JAA professional pilots licence
or Instrument
rating will be required to provide evidence of either
holding a valid UK FRTOL or of having passed the UK
RTF practical test prior to attempting the CPL or IR Skill
Test. (A student attempting both the CPL and IR Skill Test
will be required to hold a valid UK FRTOL or passed the
UK RTF practical test prior to attempting their first test,
whichever comes first).
I've tried numerous times to get the quoted text all the same size - it's PPRuNe that's changing it when I click "Save changes".