I don't believe there will be hyperinflation at all. I think there is a possibilty that inflation will overshoot central bank targets slightly, but no way will you see 'hyperinflation'. One thing you need to remember is that 75% of GDP is from consumer spending, which is subdued as unemployment is so high. You also have to consider that the british/american public are likely to have learnt a lesson from this crisis, and that lesson is the control of spending. To save money and to spend more cautiously. I think this will be a lesson that will stay with consumers for at least the next 3-5yrs. Hence, keeping inflation under control. It will be a similar time frame before wage inflation starts creaping up.
Then you come to the point of quantitative easing. Central banks have pumped money into the banking sector, however, there has not been a significant increasing in lending to the public. Even more so, people are reluctant to borrow money from the bank. So the money stays in the banks capital reserves. Not actually reaching consumers, but when it does, it will slowly seap into the system, keeping inflation under control.