Generally speaking we would recommend shifting into Park and applying the handbrake when stationary. When stopped temporarily such as at a junction, you may wish to hold the vehicle on the footbrake with the gearlever remaining in Drive. You can select Neutral when stopped in traffic but should also use the handbrake, while selecting Park locks the gearbox so the driven wheels cannot rotate, which is a safer option in case your vehicle is involved in a collision. It is also more considerate to use the handbrake and Park or Neutral when stopped in traffic to avoid blinding drivers behind you with the brake lights, as explained in Rule 114 of the Highway Code.