Less than 5 a day actually. 1754 deaths in 2012. The lowest number ever. So while there is plenty scope for dealing better with bad driving and for better road design the roads are safer than they have ever been.
BUT, are roads safer?
Overall deaths may be down, but there are many ways to achieve that, you can make the roads safer or you can remove road users. Is the increase in cycling and the increase in deaths in London a reflection that the reason why deaths have been falling is because vulnerable road users have not been using the roads?
Look at long term trends, car use up, walking and cycling down. deaths of car users down, deaths amongst vulnerable users down, but not so much on a per mile basis.