What to do with £100,000 is a very big question, to which there is no one or easy answer, and to which everyone (professionals included) will give you a different response.
If you mean you want 6%-10% income p.a., you are searching for the holy grail.
Nothing against IP High Income (where about 14% of my portfolio is invested) but if you want a total convenience, one stop shop suggestion, how about Jupiter Merlin Income? - top quality, diversification built in, but you'll pay for this convenience with a very high TER.
You could possibly do just as well yourself by splitting the total amount into smaller pots, say, top quality UK income fund or funds (or investment trusts), top quality Asian income fund/trust, top quality global income fund/trust, and a top quality fixed income fund/trust.
But, the possibilities are literally endless based upon asset classes, countries, regions etc., all depending on your attitude to risk and opinion on the future direction of world markets.
You either need to hand over responsibilty to an advisor and pay the fee (would not be my choice) or do it yourself and get at least a little bit involved, or run the risk of losing money.
It's all a bit of an educated gamble in any case, we're all taking a bets on the future, and the only way to mitigate the risk is to diversify, try to make sensible choices, and not be too greedy.
This isn't meant to sound like a lecture!
Good luck.