Nigel's idea is to do this... Looks good to me. Now all I have to do is find the emails that confirm the hotel and the Shuttle!
Getting to Arras at a reasonable time so how about once we get out of Coquelles head down the D roads to St Omer for coffee and waffles, or whatever. Then straight to Arras, so that we have time to look round the town before meeting up for a beer and some nosh. (75 miles roughly)
Fill up with fuel on Saturday when we arrive so that Sunday morning we can head off to the Canadian memorial near Vimy, then on to Lille for lunch. After lunch a steady ride back across country stopping at Cassels for a breather and more coffee, before getting to the shuttle around 17:00 (100 miles ish)