With the growing concern that my tv provider may no longer be providing UFC programming, the Internet may be my only option. Only thing is being in the UK, I always recorded the shows and watched on a Sunday morning. So can catch a replay on a Sunday if needed? Thanks UG : ) 
Yeah.. you can buy it the next day I believe.. I think purchasing it also gives you a 24 hour window to rewatch if I'm not mistaken.. I've bought from it quite a few times but always watched it live.
If you can't read that on your phone it says..
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FAQs for UFC.TV
QUESTIONS ABOUT THE LIVE PPV
How long do I have to watch the video I have purchased?
Once the content is available, customers will have unlimited viewing of said video for 24 hours from purchase. After the 24 hours complete, customers will need to re-purchase the video to continue viewing. This applies to all customers regardless if the video or event is purchased as a live event or if they have purchased the replay version.
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Clarence Parents -Thanks dude. I'll shoot ya a VU tomorrow.
If you can't read that on your phone it says..
"
FAQs for UFC.TV
QUESTIONS ABOUT THE LIVE PPV
How long do I have to watch the video I have purchased?
Once the content is available, customers will have unlimited viewing of said video for 24 hours from purchase. After the 24 hours complete, customers will need to re-purchase the video to continue viewing. This applies to all customers regardless if the video or event is purchased as a live event or if they have purchased the replay version.
"
If you know how to set up a (german) proxy in your browser, you can watch the PPV and replay on ufc.tv for free.