When I asked how long everyone thought this had been in the planning, I hadn't forgotten the interview last year in which he said he had another Shakespeare project in mind.
I am not sure that this was necessarily that project. It could have been something quite different (maybe it was poor old James Ivory's Richard II, who knows!).
I have to say that I share Anon.'s view that this feels like something of fairly recent date. TH showed relatively little interest in his alma mater previously, and I think these RADA sightings started in spring this year (possibly with the KSI screening there in early March). I wonder if somebody planted the seed then. He has been seen in the vicinity a number of times since.