I think I bricked my HTC One topic

I have an O2 UK branded HTC One which was running Cyanoegen Mod, I tried to revert back to beforer cyanoegen was installed but it did not go as well as I though. Now my device is in a boot loop, I managed to get custom recovery installed but I get Failed to mount data when trying to access anything via the recovery.

Quote:

(bootloader) version: 0.5 (bootloader) version-bootloader: 1.55.0000 (bootloader) version-baseband: 4A.21.3263.04 (bootloader) version-cpld: None (bootloader) version-microp: None (bootloader) version-main: (bootloader) version-misc: PVT SHIP S-ON (bootloader) serialno: (bootloader) imei: (bootloader) meid: 00000000000000 (bootloader) product: m7_ul (bootloader) platform: HBOOT-8064 (bootloader) modelid: PN0710000 (bootloader) cidnum: O2___001 (bootloader) battery-status: good (bootloader) battery-voltage: 3886mV (bootloader) partition-layout: Generic (bootloader) security: on (bootloader) build-mode: SHIP (bootloader) boot-mode: FASTBOOT (bootloader) commitno-bootloader: dirty-bb768ae1 (bootloader) hbootpreupdate: 11 (bootloader) gencheckpt: 0 all: Done!

Can anyone advise me what to do? I am lost here and just do not know what to do.

Thanks