Attack the steep bits, back off to go as slow as you can on the less steep bits.Ditchling is an odd hill, in that it isn't really a hill in parts. It was designed for horses to pull carts up so the angle of upness changes regularly. So for a 50 metre section it's steeper then for the next 50 metres it eases slightly, and repeats this regularly. When you can see the horses triangular sign on the left you're just about there.
Turner's Hill seems longer but doesn't have the shorter steeper bits.
(Be warned, @LucretiaMyReflection that it's worth trying to hurtle down the hill into Brighton to try to set off the speed camera. This is an ancient Fridays' tradition.)
I'd like to be with you but Real Life intervened.