The highway code recommends you park with your wheels facing into the kerb if the vehicle were to roll, forwards or backwards, and in first or reverse gear. Also, today's cars are too full of [electronic] gizmos like electronic/foot operated "handbrakes". Handbrakes should be operated by a good old lever that you can yank very tight on a hill. All these ABS, DSR, ATC, ASR, etc etc will cause us issues in 5 - 10 - 15 years time.