\link{http://www.dailymail.co.uk/news/article-1335537/The-nagging-questions-honeymoon-murder-growing.html\this article}
is interesting.
Admittedly it's in the dm, but...
it seems the marriage was never registered, therefore, they weren't actually married?
And it still makes no sense that the husband would be thrown out of the car while the wife was left there to be killed - he would have been a witness, would have had the taxi driver's number etc.
And why was he giving interviews to the press the day after, and why hire max Clifford?