Was at Apple today. First thing he done (which i didn't think of) was plug it into another monitor to see whether if it was the screen or a fault with hardware. Turns out the line wasn't present on the iMac screen he used.
£433 for a new LCD and the labour. Rediculous.
If you sit at home all the time you could get a cheap LCD monitor and external peripherals and just use your MacBook like a desktop.