Originally Posted by
Fabo.sk
He says he's putting it "within the same booking", so I think it'd be the multicity tool?
As I said though, no idea how it would be ticketed (potentially two etix, one for LON-MUC, another one for MUC-CTA) so I would not count on it to bypass married availability.
On LH booking site you can - even with a multi-city search - only book a single ticket between origin and turn around point. There has to be a fare existing between origin and destination, otherwise the tool cannot price the iternary. On a single Etix, you have only a single fare.