Sian Berry, from the Campaign for Better Transport, explains why it believes high air pollution levels could scupper the government's plans to upgrade the A14.
More top news
Remaining dry and sunny. Light winds, and feeling very warm.
The family of Lee Evans, who was stabbed to death in Chelmsford, have paid tribute to him
Fifty firefighters are tackling a large blaze in a wood yard in Wisbech. Smoke can be seen from miles around