you really haven't given sufficant info for anybody to asses your situation.
your age,will you work again,do you have a pension in place,are you already drawing it down,if yes is it sufficant to last the whole of your life.
is this money the whole of your savings and do you really want to put all your savings into the stock market,what do you know of the markets have you traded before,what level of risk are you willing to take,(would imagine should be low risk),perhaps if you reasses your situation,and give a more informed thread i'm sure theres plenty advise to be had.