Thanks jbfield. It appears the SN flight only stops on the outbound; it's a triangular route, and operates BRU-XXX-NBO-BRU, with XXX changing by day.

The only reason I'm not starting from NCL is to avoid £90 worth of APD and benefit from reduced Z2-Z5 mileage. That said, the costs involved in getting to a starting point and staying overnight might eat that up anyway.

GC - I was rather hoping to tap the Diamond Club knowledgebase. Not sure how much the *A forum can assist in the intricacies of DC. (I look forward to being proved wrong though. )