That's actually pretty reassuring. Means there is likely nothing wrong with my Heli.
I've been playing around with it anyway and I can hover. Whether that's good practice or not is another matter
Looked under the cells in the battery bay and there are indeed a total of 4 switches that can be accessed though the battery casing.
Numbering the cells left to right as 1 to 8
There is one switch under cell 1 in the down position
There is one switch under cell 2 in the down position
There are two switches under cell 3 in a red block (they are aligned horizontally) the upper switch is in the ON position, the lower OFF
If someone knows what these switches do I'd be greatfull for some info
*edit* It was the 2 red switches. They need to be in their opposite positions and then everything works fine. IE Upper Switch (switch 2) to OFF and Lower Switch (switch 1) to ON
Thanks for pointing me in the right direction gunners, I'd never have found it without you.