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Looks like an Odyssey London Mod, normally used on a bmx to run two lower brake cables with a gyro...
https://www.sourcebmx.com/products/odyssey-london-mod?variant=20033501757551
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Yeah, also a little bit 'ghetto', but it works well enough for me - I value having the redundancy, and actually having two functional levers. It's making use of this 'London Mod' for £4. The brake feel, especially when using a single lever, is a bit worse than it would usually be, but it's not too bad and definitely worth it to me.
Is this modern enough? Those are S500 levers on an Easton carbon bar.