Question to the Department for Transport:

To ask His Majesty's Government why they have paused funding for retrofitting diesel buses with selective catalytic reduction (SCR) exhausts; and whether they will provide details of the poor SCR performance as referred to in their letters to local authorities.

The Government has paused the roll out of Selective Catalytic Reduction (SCR) bus retrofit technology, following research by the Scottish Government and internal monitoring.

The Department are conducting a short, focused investigation into the performance of this technology. The results of this work will inform any final conclusions.