Doo
The new rules are unlikely to affect a Canadian taxpayer since the marginal tax rates are higher in Canada to start with. Any Canadian pilots in the UK working for a Canadian company, and getting taxed at source will most likely be unaffected due to double taxation treaties. If they do get asked to file a UK tax return they would most likely receive a refund.
The new rules are meant to grab cash from UK sourced income, that is untaxed due to non-resident/non-domicile rules.
Ciao
Muddy