For my upcoming A380 to London biz runs from row 6-26

16-19 are towards the rear of the front cabin, overwing.

Get a window seat - they are all pretty similar although I didn't like row 23 A/K as there's a bulkhead right in front of you.

Service was very slow (last flight on A380 was last year) but may have improved. You'll probably be at the bar anyway.....