I mean, if Peach just meant the route, it's kind of a nobrainer that they'll have to alter it due to the pandemic. Even without one, they might not wanna do some of the locations they had planned anymore.
If we really had 3 episodes filmed in the UK instead of 2, that screams replacement leg to me, they'll probably want fewer countries with consecutive legs than they had planned. Or maybe they won't care just to save budget.