I still think there's an element of tunnel-vision here. Say you invest in (amongst others) Dunedin Income Growth IT, you will receive a dividend of 4.7% - not bad - but the trust's share price is currently running at 29.3% growth a year. So you invest for income, but receive a far larger capital gain. The capital gain, depending on your other gains in the tax year, may well be taxed at a lower rate, or be free of tax altogether because it falls within your personal allowance, which is now (I think) £10,680 a year.
What this means is that you may rule out high-performing trusts like Standard Life UK Smaller Companies, which has a dividend of just over 1%, but is currently running at 74.6% growth over a year.
Given those figures, there's no way I'd invest in an insurance bond. Not only do I not trust IFAs, I don't trust insurance companies either. Do your own research (there's piles of free information on the web), grit your teeth and jump. It's a complete illusion that there's anything remotely like a risk-free investment. If you put the £100,000 in the bank you won't beat inflation.