In the meantime while you are figuring out where to put the money:
1. Spread it around the best rate short-term deposits - see the best buys section in AAM.
2. Decide when you will need the money and how much - this will give you a spread of money allocation based on the expected number of years you will need it in, so you need x for year 1, y for year 2, z for year 10 etc.
3. No investment is risk free, but generally you get what you pay for. With the ECB rate at 4%, anything over that starts to increase in risk (although since the banks are paying closer to 5% to borrow from each other, you can see bank deposit rates of up to 5%).
Be prepared when you go and see an advisor. As jpd says don't believe the guff they come out with if they are tied in any way. Don't be afraid to ask rude questions (like how much are you getting in commission). Expect to pay for good advice on an hourly rate (so it pays to have some homework done as above regarding timescales and risk). As you have a single large, or I would say, several quite large (3@300,000 + 1 shorter term) sums, you (or your financial advisor) may be able to negotiate a better deal from some of the banks. There are apparently high net-worth products at various levels of risk.