£100 an hour is purely maintenance hourly costs. An extra 60 imperial gallons of fuel an hour needs to be catered for - approx £60 per hour.
So, Scout flying for £160 an hour - beats JetRanger rates in excess of £350 an hour - but no real reduction from R22 hire rates, especially if you can claim back VAT.
However the machines are on a Permit to Fly so no AOC work.