O2-UK TWRP Backup?

Please can someone provide me with a TWRP backup for a stock O2-UK image? I need to return to stock but it's not possible to downgrade firmware while S-ON and the only RUU I can find is an older one than HTC restored my phone to. (I had subsequently restored a stock European HTC image but stupidly didn't take a backup of the O2 rom first.



I really need a TWRP backup of this so I can restore it. Please help if you can.



Thanks

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