I was going to read all 18 pages, but am on my way out. I have a very similar situation whereby my gt grandfather committed bigamy during WW2 and was imprisoned after the war. Curiously, lots of references to bigamous marriages in the local papers, but his story isn't there. My gran said it appeared in the Daily Star (front page apparently!), but without knowing the year, it's costly to find out for sure (assuming it's the correct paper!).
Furthermore, the trial occurred in the Old Bailey, with members of the family travelling down, and he was imprisoned somewhere in London. There doesn't appear to be any reference to the second marriage in the GRO lists, and it only came to light when my gt gran stopped receiving payments from the army, so presumably there may be a mention in his army records.
It's a bit of a tricky situation to find the relevant info as my gran was only a child at the time, and those of the next generation have sadly all passed on