NEW YORK — Media advertising spend in the top English markets around the world — the U.S., the U.K., Canada, Australia and New Zealand — has declined on average by 28.2% during the first wave of the Covid-19 pandemic, according to market analysis from New York-based advertising intelligence company Standard Media Index (SMI). However, Canada was hit harder. Of the five major English markets, Canada suffered the largest three-month decline, where total national marketer advertising expenditure fell 36.2% compared to the March-May 2019 period. The shallowest decline was in the U.K. where total advertising spend decreased by 21.9%, compared to