Widespread HDTV broadcasts via Freeview may not be possible until after the UK has fully switched to digital TV in 2012. [via BBC NEWS | Entertainment | Sky sets date for HDTV broadcasts]
Hmmm, its the may that worries me. From my probably poor understanding from what I have read, the word should be will. Then again they may be being completely accurate but misleading - it may be that Freeview will never get High Definition TV (HDTV) - if the governement doesn't "sell" spectrum to Freeview then it isn't going to happen - hence, in my analysis, why the BBC is very interested in broadband (but I don't think that is going to work either unless they can get away with "lets make programmes 5 minutes long" [update] or users accept overnight downloads).
There looks to be an accurate statement available (note the use of will not .... at least until):
Freeview will not have enough room for HD signals, at least until switchover. In time broadband may be another way we can deliver HD programmes. [via BBC - Digital - High Definition TV]