No, all pretty straight forward. If you route just off the coast you can avoid the transits other than perhaps Ostend which is never a problem.
You may however want to check on Customs clearance at Calais. I thought it had to be pre-booked, which was perhaps your intention in any case. There is no such problem at Ostend but I suspect the fuel might be more expensive.
Of course watch the factory installation at MK - it is a notified danger area.