I think the calculator has not been fully updated with these new LGW routes yet. There is no reason to believe these would not be short haul + routes and therefore get short haul + TPs when they start. If they didn't it would be a very big surprise, and they would be the only exLON flights over 1000 miles not to get short haul + TPs.
I believe
paul4040 has promised to eat his hat if you don't get the short haul + TPs!
BA to add Gatwick to Seville, Funchal and Las Palmas in S15