No, but do some research before updating the firmware or you'll get yourself in all types of trouble.
I will obviously have a read up before attempting.
The latest version for both cameras and NVR are : 8R1CK3D
So you guys would recommend staying at the initial firmware that comes with the cameras indefinitely? Assuming things are working ok.
And how do you know if you're buying a HV camera that is UK or chinese model?