As a follow up to my post regarding a brand new tank being faulty, and Nitroteks response, here is the report they sent me from checking the tank over
"The model turned on straight out of the box but would stay on intermittently, turning itself off at irregular intervals. Once the tank was disassembled, this would no longer occur: the battery has been tested, the connections have all been checked, and the other components have all been looked over, however no issues were found. The reported problem can now no longer be recreated, but was likely just due to a loose connection or snagged wire that resolved itself"
If there had been a loose connection they would have seen it, similarly perhaps a snagged wire would show signs of this

Also over a couple of days the tank was not turning on at all for me so it was faulty I do not expect to buy goods and then immediately dismantle them to get them to work.
They now want me to give my address to them so they can return it - firstly they have the address anyway BUT more importantly, I returned this item under the Distance Selling Laws here in the UK and they were told this repeatedly - no reasons necessary for this option by myself
Secondly by their own admission when they had it back it was faulty even though later they could not recreate this - this is academic it WAS faulty, and under Distance Selling Laws this means they also have to pay the return carriage costs I incurred.
I will update this information as matters evolve as to how they decide whether or not they are above the laws of the UK