In london, glassy puncture ridden particles everywhere London, marathon plus, not fast rolling but the best puncture resistance bar none.
In the country lanes out of london probably get away with any tyre, but to be on the safer side of safe, i'd say maxxis refuse, Michelin Lithions or krylions or the Vittoria Rubino Pro for which even in London i experience no punctures even after 1000's of miles run from new on the front down to the casing.
Like people say continental side walls simply rip, tear, unravel. Mostly ok, but in my experience they are hit and miss, where as the others are not.
^+1 on Lithions and Krylion Carbons