Investing £101k

I have £101k to invest and I am looking for investment advice, having not dabbled in investments before. My intent would be to invest for 5 to 10 years as a growth fund. The reason for the £101k is the extra £1k seems to push up the amount into new cheaper fee bands.

For the past couple of months, I've been researching across a number of investment companies to understand shares, funds, ISAs etc, and also trying to understand fees etc - to say it is confusing and a minefield is an understatement!

My initial plan was to put it in a managed fund, and one of the top companies appears to be Hargreaves Lansdown with their Portfolio+ multi manger accounts. But with a 0.45% fund fee, and a 1.4% OCF on top, that's quite an annual whack each year from any gains, but there appear to be quite a number of people who will pay that to get top level service. There are a number of lower % fees with other investment companies with lower fees (JP Morgan at 0.1% for example), but would you get the same level of fund management and performance?

Another one I was looking at was Nutmeg, which seems to have a 0.35% fee for managed funds above £100k (hence my £101k), with 0.21% and 0.9% charges on top for OCF, giving a 0.65% total per annum - much cheaper than HL, but I don't know much about them. Neil Woodford now has his own company and is another option. Slower performance of recent, but the thinking is he will come back strong, and he does have a considerable track record.

With £101k, an alternative suggested approach from some sectors is to go for a fixed fee managed fund. But I'm assuming the level of management service goes down due to a lower management fee in proportion to the sum invested.

So the question is, to get a better managed fund service, do I need to pay the HL fees, or are there others like Nutmeg who could do equally well, and on balance would give me a better return? Or do I go for a pre-selected fund from someone like HL and self manage?

Welcome any thoughts.