GTI - Manual:
Motorway, anything in exess of 34mpg. I was getting 41mpg the other day on a trip back from Kent.
Town, in normal driving conditions expect to get around 25-30mpg. On my usual trip to uni I regularly see 32mpg which is a 20-mile mixture of high-speed dual carrigeway driving and town driving.
Enthusiastic driving, low 20's!