Thanks for the replies, just come back to this after getting distracted by life/work. Anyway, you were right, the bitumen is a bu**er to remove and coming at the end of a long year, at the moment I'm not sure we have the energy or the money to do anything about it. Any suggestions gladly received!
Sorry, just realised the last poster did offer a suggestion, wll go and check the link, it looks useful!
Sorry, just realised the last poster did offer a suggestion, wll go and check the link, it looks useful!