Happy Now seems to have been filmed after 102D. So if the on set affair is true, then IG cheated on AE who was cheating on OP with IG. Anyway, I'm not going to judge IG for it (if it's even true) as AE was not in a position to lecture anyone about cheating.
AE and IG's "20 years of bliss" is looking more and more ropey by the day. I think AE was the gf that clung to him like a barnacle and he just couldn't shake her off. I think
@Hiraeth posted a link to a Sunday Times article with Chrissy Iley where IG was asked why it took so long to marry Alice. The answer was he 'wasn't feeling it' - so why did he marry her??