Bolloeux!
I don't know where you get your information from ....
From Flightglobal purportedly quoting the head of the Super Puma programme
The additional range has been achieved by replacing a baggage compartment with a 470 litre (370gal) internal fuel tank, says Marie-Agnes Veve, head of the Super Puma programme at Airbus Helicopters
Mind you, how she equates 470 litres to 370 gals (UK or US) is beyond me. Guess she means kilograms. Also, carrying this extra fuel is more likely to give an extra 60 nm or more (assuming a miserly 120 Kts G/S) unless the fuel consumption of the 2B is hugely increased.