Thanks everyone. Okay, I went to the Bobbi Brown counter and a lovely woman applied the eye cream, correcter and concealer. They did seem like really good products, and they worked as well as anything i've used, but they didn't seem to work any better - so I was reluctant to spend around £100 on these products [though i would splash the cash if I EVER found something that worked!]
wildscaryface - thanks for the last post, but i'm not actually troubled by bags as such, it's just these terrible dark circles.
whatkatydidathome - thank you, but touche eclat doesn't even touch them
- makes them worse in fact as it highlights them. Infuriating, as it's always raved about as a wonderproduct!
Suzy1975 - very interesting about the iron shots. I think this is worth looking into - and i bought a multivitamin with iron, so hopefully this will make a difference. I looked at Spatone in Boots but was shocked at how pricey it is! £6 for 28 days - but again, if the multivitamin doesn't make a difference, i'll probably end up trying it. Can you sense the desperation?!
Thanks Otchayanaye - firstly, you don't sound boastful at all! But you do sound like the voice of experience and I am furiously jotting down a note of all the products you suggest. You are right, i will probably never completely cover them, but they are bad enough that i feel i must try something!
So, in the meantime, i'm drinking water, taking iron, and using an eye cream religiously, rather than lazily, as i used to 
Thanks again everyone. It is comforting to know that at least there are other dark circle sufferers out there! At the end of the day, i blame the DC 