Thanks June, I certainly never envisaged such a lively debate springing from that question!

And thank you for the replies all - now I may be able to sleep again. The question arose when I was lying in bed and mentally parsing that sentence (this is about as effective a method of lulling oneself to sleep as counting sheep - i.e. not at all effective) and I could not for the life of me work out what the 'there' was doing.