"Folk clubs, house concerts and festivals are not affected by this"

That's a relief. I hope it's true. Otherwise it would be no more Mill Race Festival for us or any other foreign visitors, and that would be a shame.

As for tax, the way it works for us is: we (from UK) filled in a tax waiver form so we didn't have Canadian taxes deducted - presumably the Canadian Revenue relay info to the UK Revenue who would be able to check, if they wanted to, that we'd declared the income on our own tax return.