HM Hampshire and Isle of Wight Constabulary are ineffective. They fail to enforce the 30 mph speed limit in Castle Street, Portchester and Whitehart Lane. Council informs me that local residents oppose reducing the speed limit in Castle Street from 30 mph to 20 mph. I wonder, therefore, if there is a need for the infamous British compromise. 25 mph is 40 kph. 25 mph or 40 kph are urban speed limits found globally in many other jurisdictions, including the City of New York. Perhaps local residents opposed to a 20 mph speed limit might be willing to accept a speed reduction from 30 mph to 25 mph. I would be interested in seeing the public acceptibility, vehicle traffic, crash, mortality and morbidity data comparing 25 mph to 30 mph, and 25 mph to 20 mph. Of course, the statutory law in England and Wales currently precludes a 25 mph speed limit on national highways, so a change to the law would be needed.