Seems like consensus is it’s a JetBlack Volt but with zero software support and a number of firmware bugs.
There’s something similar branded as XPlova and the reviews on Wiggle/CRC say similar things about firmware support (even though that one has the Lifeline and Acer brands behind it).
I might be willing to take that risk at £150 but not £300, even though that’s a great price for a JB Volt.