EASA Over Water
I think the 'over water' bit is the stumbling block with the CAA/EASA, that is why the 'twin' scenario will always be expensive, and a turbo prop is never cheap to maintain. In fact a piston Islander on full load is not a happy bunny on 'one', but it does have 'user friendly' handling which helps. The latest situation re a new Heliport at PZ is now back in the melting pot as the recent planning consent has been withdrawn by Cornwall Council due to 'issues' with the planning process. The original location was perfect (now a supermarket) but any alternative will have far more restrictions due to the surrounding area having been developed and also terrain implications for weather/wind conditions. Another factor with helicopter ops is the extra fuel required to carry for a poss 'alternative'. Lands End is hardly an option when it is marginal, and Culdrose not open at w-ends or for periods in the busy summer period. Alternative fuel can make the difference of 2-3 Pax,so bang goes that revenue.