I'm planning to do this next year, subject to being able to get everything together in time, otherwise it will be the year after. And when I say planning, boy do I MEAN planning ! IO540's got it about right, overflight permissions, fuel availability, fitting a G-reg plane with ferry tanks, accomodation, maintenance etc etc etc - when you get into it, it's all a little overwhelming ... mind you this is all going to be a doddle compared to breaking the total cost to Mrs. FF !!
As to being able to do it VFR on a plain PPL, well, that might be right technically, but I'd be interested to hear of an insurance company that will insure you across the pond without an IR, and that's just for starters ...
FF