Galaxy S6 Edge [SM-G925F] - Stuck in TWRP Bootloop/Caused by SuperSU

So my S6 Edge (O2UK) is stuck in a recovery bootloop, It can go into download mode.

Things I have tried

• Reflashing firmware (Odin fails at hidden.img)
• Clearing cache etc in TWRP

The bootloop was caused by SuperSU as it asked me a question about TWRP recovery and something obviously corrupted or is badly configured.
Any help is appreciated!

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