Default [Q] undo S-On, no adb devices listed HTC One

Hi,

Tried to move back from CM11 to stock but have broken it along the way. I think it is because I am now S-ON but I am unable to get adb to recognise the phone. Please can someone advise?

Many thanks
Stuart

1.Reboot hangs on HTC logo

2.Bootloader details:
TAMPERED
UNLOCKED
M7_UL PVT SHIP S-ON RH
HBOOT-1.55.0000
RADIO-4A.21.3263.04
OpenDSP-v32.120.274.0909
OS-3.62.206.1

3. I can install TWRP and CWM Recovery.

4. Fastboot Devices returns my device ID but ADB devices lists no devices.

5. When in recovery I can sideload zips but they fail due to being "unable to mount usb/otg"

6. I have used Squabbi's toolkit v3.2.0 on windows 8.1 and windows 7 (virtual machine).

7. UK 02 HTC One