Just thinking about Season 19 script editor, Antony Root and I realise I know next to nothing about him.

So who was he and what exactly did he contribute to Who? I'm sure I read somewhere that he was hardly involved and that Eric Saward did the bulk of the later script editing of the season. Is that true or did I imagine it? Also hadn't Chris Bidmead already set up the beginning of the season or did I imagine that too?