tb10er - would have been my choice, too - but if memory serves me well (note the Florida address [seven years]) there's 101 nautical miles of salt water between those two beacons.
coopervane is clearly approaching this flight with a little trepidation, rather than lots of experience, we shouldn't encourage such long (to them) overwater crossings to someone who has already considered the potential for problems.
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Actually, to be totally honest, I would draw a perfectly straight line from Barton to Ronaldsway and go that way with a LARS from Warton and IOM(it's cheaper).