I have, and it would probly be my best choice. However, with insurance figures of £1500+ free insurance on 65bhp dci and 1.2 16v mean that I its not a realistic option at the moment. I had consider this before my accident, however, with 0 or 1 years no claims, 1 accident (partial blame) and 6 points, I cant really afford the insurance.
Having worked out the figure I reckon that the diesel saves just under £300 a year in fuel compared to the 1.2 16v. However, I would have to keep the car longer than 2 years to get the £740 extra back!! As I am not keen to keep the car so long with the miles I do i reckon its not worth the extra.