Mr Pralong said Bangkok recently experienced peak PM2.5 levels of 102 micrograms per cubic metre but the reading yesterday was under 90.
As residents woke up yesterday to yet another day of murky air blanketing their construction-busy city, environment group Greenpeace said Bangkok was now the 10th most polluted city in the world, rivalling some places in China.
The Government also intends to restrict sales of wet wood for domestic burning and apply sulphur and smoke emission limits to all solid fuels. In addition to cars, diesel-only trains will also be phased out by 2040.
The proposed Clean Air Strategy will cut the costs of air pollution to society by £1.7 billion every year by 2020, rising to £5.3 billion every year from 2030.
Pressed on whether the strategy, launched on Monday, comes too late, Mr Hancock said: We need to do everything we can to improve air quality.
The changes will also mean only the cleanest stoves will be available for sale by 2022 and councils will have more power to take action in areas of high pollution.
"We urgently need these guidelines adopted into national law, to accelerate coordinated, bold and ambitious action that will protect people's heart and circulatory health wherever they live in the United Kingdom". In short: clean air helps you live longer.
A government spokesman said junta leader Prayuth Chan-ocha has ordered related agencies to inform people of the danger of ultrafine particles after Bangkok's air quality this past weekend again fell to "unhealthy" levels.
"The authorities must ensure clean air for everyone, or at least they should improve their strategies to protect people from air pollution and raise public awareness on this unsafe threat to their health".
"In particular, it's good to see it includes proposals to improve access to air pollution information, something numerous patients we support ask for".
Responding to today's announcement, ClientEarth's head of public affairs, Simon Alcock said: 'This strategy doesn't address the huge problem of air pollution from transport that is harming people's health.
"However, we're disappointed that it doesn't include a clear commitment to adopt the World Health Organization limits for particulate matter pollution in the upcoming Environment Bill".
'No one should have to breathe toxic air, especially not people with a lung condition or children whose lungs are still growing.