The current rules given to crew for Spain (at LHR, I'm assuming Euroflyer uses the same system) are that masks must be worn in Spanish airspace, both inbound and outbound. Quite how we're going to enforce that is anyone's guess 😄. For the Canaries are we supposed to get you to wear masks for the last minute of the flight on final approach? Answers on a postcard please, we cabin crew could do with the help!