I was most bemused! Fortunately, a very nice young lady offered me somewhere to sit down and a cup of tea.
Luckily, the rear brake lever took most of the pounding, (although it's been well bent...the rear sub-frame probably needs straightening too) and the right hand indicator's snapped off, but fortunately no more than that.
I'm fine apart from a rather bruised elbow & hip. My wallet's going to get a bruising too...

Upon inspection, there was a nice big splash of diesel right on the apex of the bend...there should be a law against lorries over-filling their tanks up! The stuff is bloody dangerous.
Royston