That's a strange list. I wouldn't put SFA in there... I don't remember ever seeing a gang of lager louts in football jerseys aggressively shouting the words to an SFA song. That is the measure of what is or isn't Britpop I reckon.On Creation and more importantly on the wikipedia Britpop list.
EDit. Looking at that list Cornershop deserve a mention for being class. I love Ash too but they're not really Brits.
Also, Divine Comedy? And where exactly are Radiohead in all this? They were "just" a guitar band until about '97.