@Davina77 

Hi,

I would say there are two ways to do it. Personally I'd recommend no. 2.

1) Reset the C200 cameras and then set them up again the same way you did back when you first got them.

or

2) On your new BT Hub modify the names of its wireless networks (SSIDs) and their associated passwords to match those of your previous BT Hub. After you have done that all the existing wireless devices in your home should be able to connect to the new BT Hub without additional effort.