As reported here there have been various statements issued related to "hands only CPR". The American Heart Association have advocated a move to "hands only" CPR dropping the need for nouth to mouth, but the European Resuscitation Council believes there isn't sufficient evidence to warrant a change.

The UK Resuscitation Council have pinned their colours to the mast here, and also believe the evidence isn't compelling enough to require a change before the 2010 congress.

Therefore the current UK and European guidelines can be found here or you can watch a video here.

In first aid trainng CPR is the area of most change and probably most research. The Amercian Heart Association issued on 31st March 2008 new guidelines aimed at the layperson. Details can be found here, but essentially a bystander witnessing a sudden collapse in an adult is recommended to only perform chest compressions.

This has lead to the European Resuscitation council issuing its own statement not altering its existing advice, click here for a PDF version. So for us as a UK based training company, until told otherwise its still 30 compressions followed by 2 ventilations.

If a rescuer is unwilling or unable to perform ventilations "hands only" CPR would be better than no CPR.