I've more or less got the outward route sorted, day one Omagh to Newcastle via Cairnryan using main roads with a couple of stops, day two IJmuiden to Frankfurt via Arnhem, day three Frankfurt to Salzburg via Dachau, day 4 Salzburg to Lienz via eagles nest and Grossglockner, day 5 Lienz to Trento then Trento for 4-5 nights, leaving 5 days back to roscoff, I'm still trying to sort this bit as there's a lot to see on way back, we've done oradour, Carcassonne & millau, thinking maybe try some balcony roads, as I said not afraid to hit motorway to make up miles, some great suggestions in above posts I've tagged them in Google maps and trying to plan a route with 1-2 point each day on way back.