Wrynose and Hardknott Passes in the lakes, for last 20 years been fave (first go in a 1.0 metro, stunned it made it, now in GTI way too easy but still fun and one of the steepest graded roads in the UK), but for blasting along (within uk speed limits of course) was the A roads from Chester all the way down to Cardigan bay (last years hol's, sorry no idea what they were called but wow! week day so limited traffic in sumer away from school hols, bliss!)