Zurich has seen a significant rise in large case policies issued over the last year.
The provider reported a 20% increase in the number of policies sold with a sum assured of £1m and above.
There was also a 9% growth in applications over the same period, something which the insurer said was part of a longer term trend.
"Since 2007, large case applications have increased by 140% despite the fact that the widely-reported protection gap shows no signs of closing," it explained.
In a bid to help advisers understand more about this specialist area of underwriting, Zurich has produced a reference guide for those new to this area.
The Guide to Financial Underwriting and Large Cases, aims to provide advisers with information about its service and support available.
