Vrbo (HomeAway) has made a change to their system so that the guest will go through the relevant 3DS checks at the time of booking. They will then send us the results of these checks as secure tokens when they provide the card details. We can then use these results when we process the payment meaning that these transactions will comply with PSD2.
Secure Trading and HolidayRentPayment can accept these 3DS tokens.
Sage Pay currently cannot.