Unblocking shower drain

No, nothing works apart from physically cleaning out the shower trap and cutting hair shorter.

Buy a drain snake at the pound shop or online. You can get all the accumulated hair out of the drain without using strong chemicals.

I bought a plastic mesh mat (like this one) and cut it to fit across the drain under the cap.
This traps any hair and I can clean it off easily each day.

Hair plug catcher.. on amazon.... no chemicals involved.. lasts forever.
£5 for 2, free delivery.

Veet hair remover - put some down the plughole, it will dissolve the hairs in much the same way it does for hair on armpits or legs

I have ordered a shower drain cover from amazon - thanks for the idea - in fact it is hard to find one to fit as it is a walk-in shower with a large plughole that already has a solid cover on it, but it lets in water around the edges. I will try the one I have ordered and hope for the best.

It sounds like my Dad's shower in his apartment.
I clean it out every so often for him, fortunately he doesn't have long hair!

I think that the mesh /trap is a great idea .

I discovered Veet after the shower drain was blocked with hair from three long haired women living in the house !
I'd leave it in the drain overnight .