According to the World Health Organisation (WHO), the number of people suffering from Alzheimer's disease (AD) worldwide is around 18 million. The prevalence of AD doubles every five years between 65 and 85 years of age and it is estimated that due to the ageing population, 34 million people will suffer from AD by 2025. The WHO has also stated that if AD onset were delayed by 5 years, the number of cases worldwide could be halved. Currently there are no curative or disease-stalling treatments for AD and a major research effort is underway in order to better understand the molecular and cellular details of the pathways that result in this devastating neurodegenerative disorder. This research is critical if effective therapeutics are to be developed.