While you say that we can target all learners on selected courses, even if they are not all GLA-AEB funded learners – if there are only very few students that would be truly eligible, would it be ok to just target those ones? I.e. if only 1 student in a class of 15 is likely to be eligible, would it be acceptable to just ask that one student to complete?
In that case, yes, it is absolutely fine to target specific learners if this is possible and you are happy to do so. While we can remove any learners from analysis who are ineligible later on, if the proportion of ineligible learners in a class is likely to be high then it is beneficial to just target those who are eligible from the start.