In reply to Chris M: Good effort. We did something similar a few weeks ago - all the 2 & 3 star HVS & E1 lines at the crag based on the BM&B guide - 16 routes in all, finishing on the beast that is Brimstone.
It's amazing how quickly you can get up routes when you're under pressure. Embankment 3 took 15mins from the leader setting off to both of us being back on the floor. Great North Road was was 18 minutes for both of us to get up it and Dexterity took 11 mins for both of us to get to the top. We then skipped up April Arete even though it only get's one star. Try that challenge next!