hi allyson, leave the m25 at junction 2 to get on to the a2 london bound to get to crystal palace , then take the 4 th junction & follow the south circular to crsytal palace ,easy, this will probably take about 1 1/2 - 2 hours through some of the most dense traffic & shopping area's possible , not very nice, as for the bus route to get into central london probably another 2 hours,also i wouldn't like to walk around the crystal palace area at night .leave the m25 at junction 2 to get on to the a2 london bound , then take the 2nd junction & follow signs to abbey wood , this will probably take about 5/10 minutes .mainline station 5/10 walk direct train every 20 mins to central london i also would not like to walk around the abbey wood area at night , like tony ash i also live near abbey wood ... if i was you i would cancell crystal palace & book abbey wood... hope this helps ....pete