We recommend purchasing a full set of Ordnance Survey maps of the course for each support car. You will need Landranger Sheets 173, 174,175 and 176. These driving instructions are provided in good faith but should not be relied on blindly as road layouts can be changed. The instructions from Devizes to Reading were compiled in 2007, the instructions from Reading to London in 2009. The instructions are updated periodically so it is worth checking back to see that you have the most recent version by the time the race comes round.
If you are driving the route and are able to update the driving instructions, please get in touch.
Paddlers cross eight (8) roads as they move down the course. DW does not marshal traffic so support crews are strongly advised to be in attendance at road crossings to ensure their paddlers get across safely.