stop tap

Morning, I need to replace the stop tap shown as the handle has snapped off and its seized anyway. Can I replace the handle and 'insides' or does it need a whole new tap? The pipes look imperial size? Cheers.

Hi, Currently my internal stop tap isn't working. When it's fully closed it hardly reduces the flow of water. I'm be been told it's likely that the washer had gone. Where would you get a replacement washer from and would I just ask for a 15mn stop tap washer? Any tips for doing the repair...