The couple – who have lived in India, Nepal and Australia and holidayed in South East Asia, South America and Africa – have recently bought a house in France, where they plan to spend half of the year.

To supercharge their self-invested pension pot, they plan to move out of the family home and downsize to a smaller property.

This, combined with the cash left over from winding down Mr Jordan's limited company, will leave the soon-to-be pensioners with around £750,000 to invest.

This is on top of additional cash savings and employer pensions worth more than £700,000.

The couple also plans to gift roughly £100,000 apiece to their two adult children, which they expect to fund by selling one of their two buy-to-let properties: a student house in Brighton and a cottage in West Sussex.

But with an estimated 20 years of retirement spending to enjoy – and more for his wife – will Mr Jordan's savings stretch so far? We put it to the experts to find out.

Rachel Winter of wealth advisers Killick said:

Mr Jordan already receives an annual income of around £24,000 from his larger rental property, meaning he will require a further £21,000 income from his investment portfolio in order to make up his £45,000 income requirement.

If we consider all pensions, the Isas and the house sale proceeds, his investments will need to yield of around 1.45pc annually to make up the shortfall, which is very achievable indeed. Even without the additional income from the rental property, this would still be achievable, requiring an annual yield of around 3pc.

Big pension providers tend to automatically switch clients to lower-risk investments as they grow older, which made sense at the time when buying an annuity was the only option at retirement.

These days, however, people are living longer, meaning they should be taking on a little more risk to continue to grow their money over time. This is especially important when a 10-year UK government bond offers a yield of just 0.78pc per year, which is well below the current rate of inflation.