We will now press ahead with further improvements, again overnight wherever possible, with a view to completing work on all three tunnels in 2017”
Byddwn yn mynd ati bellach i fwrw ymlaen â rhagor o welliannau, gan wneud y gwaith dros nos eto os bydd modd, gan anelu at gwblhau’r gwaith ar bob un o’r tri thwnnel yn 2017”.