Scirocco Register

My Storm decided today to cut out when I came to a stop at a roundabout, it felt like it had a fuel blockage! The filler neck and tank are in fine fettle and the filter in the engine bay is less than a year old.
No problems when motoring at speed but shite at urban speed (30 mph or less!) feel like I have to keep it reving?

Ideas or suggestions?

if it was a carb i'd suggest a blocked jet. i'm asuming this is k-jet though? ill post up some helpful k-jet diagnostic stuff shortly...

Cheers mate, it is K-jet