how the f**k can i only get 200 miles on a full tank £40
??
I usually drive quite swiftly & get between 220-250 to a tank (approx 24 mpg). I'd say there was a def prob with yours, as if I drive like a granddad, I can get 35-40 MPG.
It could perhaps be your exhaust or cat??
I got 50 miles to half a tank, once, when my old Pug 306 had a leaking exhaust.