Derek McDowell (Labour)

I do not wish to sound too cynical, but it has been 25 years or so since the decision was taken in principle to change signage to metric. We still have not done so in most parts of the country. It will be a logistical nightmare to replace tens of thousands of signs within three days. Assuming we do not succeed in replacing them all, what will be the status of the old signs after 20 January?