Here's a fuller version of the story that I found. But no news of how Igwig is getting along. I see Mrs W has been barred from the pub, so I imagine he will be as well, since they are said to be inseparable.

Mrs Susan she got drunk,
She threw me at PC Richard Van Arendonk
When that constable had to come to take us away,
I don't want to worry poor Constable Harry.
Let's kiss and make up, and Iguana go home.
Iguana go home, Iguana go home
Let's kiss and make up, and Iguana go home.