Great fun. 5*

Well imitation is the sincerest form of flattery. I Found this quite easy, probably because I was LITERALLY FIVE MINUTES from posting my own grid with Botticelli's birth of Williams as one of the clues. Which you've now completely ruined for me because grids like this still need red herrings and your group straddled two of my planned crossovers. so I can't just blindly replace the group. A days effort wasted. Grrr.

Calm down Mr T. Pity the fool.....