Sydney plumbing contractor Geoff Thomas is ‘that Vietnam vet from Q&A’. He was the one who asked Opposition leader Tony Abbott when he would support gay marriage.

Since then Geoff has become an advocate for same-sex marriage, and he features in a special Compass program on ABC1, looking at the issue.

Geoff and his son Nathan talk about why they both support same-sex marriage.

For more information and the audio file, click here