Surface Pro 3 BSOD KMODE_EXCEPTION_NOT_HANDLED mrxsmb20.sys

Hi

Have been having repeated BSOD's on my vanilla Surface Pro 3 i5 256 GB:
KMODE_EXCEPTION_NOT_HANDLED mrxsmb20.sys

They only appear to happen when I am on the docking station.

I have done a clean "Recovery" from preserving user files once, and most recently a clean recovery of the device.
Windows Updates have been installed, and the November driver pack was downloaded (today) and installed for good measure.

I am using BlueScreenView from NirSoft but I can't see any other driver that might be causing the problem.

Advice much appreciated.

Thanks

David