I routinely travel with wine bottles from SA back to London on the return portion of my ex EU’s.
21 bottles is my max (2 bags), and NEVER broken a bottle. I wrap them in some newspaper 2 sheets. Seal it with scotch tape, then stuff it inside a dirty sock. Sometimes, but not always this goes into a wine box from the supermarket. Into the suitcase. Never had any issues whatsoever.
Dont even bother asking for a fragile tag, and I’ve never even mentioned to check in staff.
I will possibly be doing this again on Tuesday.. Joburg to LHR via MAD and BRU. Do not expect any issues at all.