It will be fine Ken. If UK passport holders are restricted to 90 in 180 in the same way that other non E.U. visitors are (and UK will not be treated any differently than other non E.U visitors), then Morocco will become even more popular. Over winter for 3 months in Moroc then spend under 90 days swanning around Spain/ Portugal/France. Perfect! everybody will be happy.You be lucky if you can get past Calais this in 2021. Green cards will be non existent if this years shenanigans have been anything to go by. Or perhaps you have an Irish passport!