I heard the same thing.
I could be wrong here (and don't have time right now to look it up), but I vaguely remember something about being able to have more frequent tests on the NHS if you have a family history, etc. I believe there are circumstances which will allow you to have a test more than the usually allotted once every three years. Anyone?
I had a dodgy smear result in January 2005, resulting in being invited for a retest, followed by two colposcopies, followed by a LEEP procedure. I've been invited for retests at least once per year in the past four years, and to give anyone out there hope who may be worried on your own behalfs, I can say that I've been clear for the past few smear results, and the NHS continues to invite me back every year instead of every three years, given my history.
I asked an English colleague about this subject, and she said when she was younger, she was a hypochrondriac and used to ask her GP for all sorts of tests (convinced that any symptom she had was the indication of something disastrous). She was able to get a cervical smear before she was 25 just by asking for it. Her belief is that if you request a smear, they will give it to you. She also said that if that wasn't the case for all PCTs, one could always go to a sexual health clinic and ask for one there. Whether anyone in the UK can in fact walk into their PCT or a sexual health clinic and arrange a cervical smear regardless of whether they are over 25 or have already had one in the past three years, remember the sayings "if you don't ask, you don't get", "the worst they can say is no" and "it doesn't hurt to ask".
Good luck everyone.