A 2010 report from Aviva sheds light on the financial state of Britain's senior citizens.

Between warm weather, rich local culture and one of the best healthcare systems in the world, it's not surprising that Mexico is an increasingly popular retirement destination. Yet what's more interesting is the rising interest in spending old age not on land, but at sea.

A new generation of pensioners are forgoing the cliché of living in quiet seaside towns for the hustle and bustle of city life. Rather than selling up their London pads and moving south, they are embracing the 'retirement nirvana' that's right on their doorsteps.

More than a quarter of British companies are set up by people aged 50-65 – with a higher success rate than any of their younger counterparts. But why are so many older 50s taking on challenges and starting new careers, when their parents rejoiced at the thought of retirement?