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If you google "Canada EU trade agreement" you'll find this: Canada-European Union Comprehensive Economic and Trade Agreement (CETA). It went into effect September 21st, 2017.
That won't affect the VAT. In the UK VAT is 20%, VAT is also payable on the postage costs and mail services levy a VAT collection fee for having to administer the customs check on behalf of our actual customs service. On something this expensive that adds up to a very significant additional expense if buying from overseas (it's a major reason I don't find many bargains on Drop compared to buying stuff from regular channels, we can buy Sennheiser HD650 and even HD660S headphones for not much more than the HD6xx if we shop around).