This was a great discussion Nicola, and just the start of a bigger conversation that we may start here.
I think that, of course HPL competencies can be developed by SEND pupils. All ages can engage with the HPL language, skills and progression.
I think there is a possibility that the HPL competencies may be used almost as adaptive teaching. In any given subject there may be different competencies that different pupils may need to focus on improving. Same outcomes for activities but focusing on different HPL competencies.