I think if I still lived in the UK and fuel prices were the same, I'd have had that conversion too. It does sound mighty strange. I had the unfortunate experience of being behind an outfit on the A66 that had a similar thing happen. It appeared that as the tyre blew that wheel "dug in" causing a braking effect and thus pulling the whole outfit in that direction. But there could be many many reasons. I guess it would be wrong for us to try and work it out here purely on speculation. Suffice to say, I have the utmost faith in all my LR's as towing vehicles. I prefer to tow with my Deisel, as the power is much smoother, and far greater in grunt. We have an off road trailer tent that wieghs about 1200 kilos, and we tow that in "all sorts" of situations, so far so good. I hope that you and your wife are OK, and all that is hurt is her pride, and your vehicles.