Move to somewhere more civilised, mine's never been down for a UFC event, seriously never. Are you getting it via Sky and a dish?
And if it is down why stream when you can use the BT Sport app? I've never really used it but that's because BT Sport via my YouView Box is great but I do have BT as my ISP too.
Buy a cheap tablet with HDMI out and a Bluetooth mouse stream the BT Sport app on the tv, that has to be better than some random stream that's probably BT Sport anyway? That's how I watch Sky via Mobdro or Kodi, so it'd be fine with the BT Sport app. It should work on Windows too via an android emulator.