Sorry to hear about your father, Guy.

As STEMO said, what will work for some people might not work for you. Take some time to think about the options before doing anything irreversible.
The money won't do much for you in a savings account at the moment so for the medium to long term you are right to be thinking about putting it to property or some asset that will hopefully give you a better return. For a month or two, though, it won't hurt to sit on it and consider your options carefully.
Unless you have a
very good mortgage rate, it is probably costing you more to borrow on your mortgage than you'll make on the money as savings, so paying off your mortgage is probably one of your first priorities unless you have an investment plan that will bring in significant returns. If your future plans involve borrowing anything, though, bear in mind that not having a mortgage might lower your credit rating. If you can do so, making a lump sum overpayment to your mortgage, but keeping a token amount outstanding, might be a better option for now. Check if there are any penalties for doing this. Even if there are, it'll probably be worth your while just paying them, though, as they'll probably be less expensive than the interest you'd otherwise pay on the loan.
Next, I'd consider your home. You might want to consider investing in a more expensive home, with a view to downsizing it to release some capital when or after you retire. It won't give you a regular income, and will probably cost you in higher bills, but the value should still appreciate.
Then there's the possibility of rental properties. Your job takes you out and about a lot. Do you have the time to spend looking after rented properties or would you need to employ an agency to do that? Find out what all the costs would be and how much would end up in your pocket at the end of the month and see if the return would be worthwhile.
Then take all these ideas to a financial adviser and see if he has some more ideas to add to the pot. You will have to pay to get impartial advice but given the sum involved that will be money well spent. Notice how many times I've used the word "might", "possibly", "probably", etc. it'll be his job to remove them.
