Given I can get a 1.2 with the same spec at the Twin for £1500 less (only paying 17.5% vat) and without the wait, I am finding it difficult to justify the twin over the 1.2 - decisions, decisions!! I'll need to be doing a lot of miles on the car for the economy saving to negate the extra expense.
The dealer did not know whether the servicing charges would be more or less that the 1.2.
You won't pay any road tax for the TwinAir either.