Thank you all for your kind thoughts, you're right of course, there was nothing I could have done to avoid the accident with the deer. When I drive around and see dead animals on the road I always feel sad and think thank goodness it wasn't me who killed it. I can't even run over an animal that is already dead, it seems disrespectful so I always drive round it.
The dent on the front of my car is going to cost £120 to repair. My garage man uses a body shop man who works for himself who is very reasonable, he says he can push the dent out and make a good repair without replacing the whole panel. He can't get it in till early next month because he is booked up with work, so that's a good sign if he has lots of customers.