The channel, which is available to pre-order now, is set to deliver its first broadcast on 2nd August with the FA Community Shield between Arsenal and Chelsea, the traditional curtain-raiser for the new football season.
To watch BT Sport Ultra HD you'll need the new BT Ultra HD set-top box, which is a YouView box made by Humax (the DTR-T4000), a BT Infinity broadband connection and the new Entertainment Ultra HD package. But you'll also need to check your TV, and any other products, meet the necessary specification.
MORE: 9 reasons to buy a 4K TV
The small print on the BT website explains that BT's 4K service "requires the TV to support HDCP 2.2 content protection and a picture resolution of 2160p50 (sometimes known as 50Hz) over the same HDMI port [an HDMI 2.0 input]".
4K TVs from LG, Panasonic, Philips, Samsung and Sony are compatible, but there's no support for any Toshiba 4K TVs, nor mention of other budget brands, such as Bush or Polaroid.
Certainly if you're an early-adopter who has owned a 4K TV for a few years, it's likely your TV won't be up to scratch.
What's more, if you use an AV receiver in your set-up, you will again have to check that it has an HDMI connection with the necessary spec support. Otherwise you may need to rejig the way you connect your system.
The BT Ultra HD box has one HDMI and one digital optical audio output, with the box's manual confirming: "Your other equipment needs to be able to work with Ultra HD or it’ll default to HD." It appears both connections are capable of outputting Dolby Digital surround sound.
Head over to the BT website for a full list of BT Ultra HD compatible TVs.
The battle between BT and Sky for TV supremacy is getting ever more competitive and 4K Ultra HD looks likely to play a part. Following news of Sky's 4K box yesterday, Sky is set to announce its latest financial results tomorrow [Wednesday 29th July], so we could well hear more about the company's UHD box, which has been dubbed 'SkyQ'.
See all our 4K TV reviews