For me, particularly, today has been a much-needed rest day. We have driven about Hauts-de-France, finding first a Lidl to do some shopping (leaves the one at home standing!), then a lake near the banks of the Somme where we had lunch, and then in the afternoon we drove to a town called Doullens, where there was a citadel, which we looked at the outside of, and a museum which we should perhaps have visited. It also had services, which we used (€2), and we had a cup of tea.
After which we decided to go to Arras again and park up in the big car park by the cemetery where my uncle's name is on the Royal Flying Services Memorial, where we plan to spend the night.