This was a joke about the UK not getting a good brexit deal and instead trying to get a deal like Canada, and therefore not being able to sell its excess electricity to somewhere closer, like the EU.

Exactly. The "super canada" concept. Anyone who thinks Canada is in any way comparable to Europe as a UK trading partner doesn't know much about geography. Maybe if Britain hadn't had a hissy fit they could now be selling that extra power across the channel.

Well I believe the UK and EU are working on the agreements necessary for cross border trading of electricity: https://www.gov.uk/government/publications/trading-electrici...

There's no reason to believe that something won't be worked out in time.

So if by "hissy fit" you mean the people of the UK looked at the pros and cons of EU membership and narrowly decided that the cons can be lived with then.. yeah sure.

Huge amounts of power are already traded every day between the EU and UK.

Live view: https://www.electricitymap.org/map

The UK is selling extra power across the channel. There's currently 5.5 GW of interconnect with the EU, with almost 18 GW expected by 2023. Brexit isn't going to change that.

https://www.bbc.co.uk/news/uk-england-hampshire-55750411

At least we ended up with Canada - some were trying for an 'Australia' deal.

I think OP was being quite dry with those two last lines. At least, that's what I upvoted them for.