There, that is much better than flippancy answers. You may have a very good degree of cycling skills and awareness but many many do not.
Edit. At NO time can any other vehicle enter a pedestrian zone without it being illegal.
Question for you Stat. If you are within the cycle lane trotting along quite rapidly and you come upon a bunch of pensioners enjoying a leisurely cycle will you automatically go out into the pedestrian area to continue your speed? Or would you slow and politely ask them to make way?