I’m off down to Orpington Monday Afternoon from Lancs for a Tuesday morning drop, Any safe parking nearby south of the dartford crossing if possible. Any suggestions please. 
you could park by the old merry chest cafe not sure its still open mind but you can park there DA2 8AH i think its actually roman road
If you are down there in god time come off the first junction after the dartford and head into dartford as soo as you cross the m25 there is an esso garage you can get in there garage is 24hr so safe ignore the clamping signs let the staff know you will be staying with the lorry and you will be ok
You can park on the industrial estate in Murray Road Orpington ( BR5 3QY ) or the carpark at Chipperfield road ( BR5 2FE ) depending what time you get there space may be limited til after 5pm when people start to go home.
Either that or come off at the A20 and head for Farningham/Brands Hatch, couple of laybys set back from the road.
Hmmmm, Orpington, that’s Derv nicking central from the caravan crusaders. I would suggest Glasgow. 