MR LAX
You see you've lost me now.  You told us that there were two at a tree near Metal Box, one joined them.  You then said the two at the footbridge then proceeded towards Metal Box, towards the robots and then there five.  Now what I'm trying to understand is, at which stage did you get onto the roof, was it - I'm just not sure and I'm not sure which vehicles left where at what point.  Do you understand my problem?