I have been told by Australians that for them it is illegal to not vote.

I would support such a law in the UK, not least to recognize the sacrifices made by the suffragettes, the various civil rights organizations, not to mention the soldiers who died protecting democracy from the Nazi's in WWII.

I would also support it as a mark of respect for the numerous pro democracy activists worldwide who have risked and continue to risk their lives in its name.

Voting is a moral obligation.