Sorry, but I never put anything in my hold luggage that I couldn't bear to lose or need urgently at the other end.
Travelling soon. And I have bought myself a decent comfortable haversack which will carry all the important stuff: spare glasses, iPad, iPhone, charger and adapter, house keys, travelling docs, medicine, pounds and euros and credit cards, small travel toothbrush and toothpaste. I'm sure you have additional items.
Just assume that your hold case vanishes never to be seen again, and work from there.
(Ps, I have now started carrying a photo of my small hold case on my iPhone, with brightly coloured ribbons attached to the handle. Mine is a black Antler, one of millions, so this might help if it goes missing.)
Ps - am stuck with travelling with Easy Jet this time, but when I do BA, nothing goes in the hold.