Pam fod Llywodraeth Cymru wedi methu â llunio cynlluniau wrth gefn o fewn y tair blynedd ddiwethaf, yn dilyn y cyhoeddiad bod y risg i ddiogelwch ar Bont Menai wedi'i nodi am y tro cyntaf yn 2019, a bod Pont Britannia wedi'i chau saith gwaith y flwyddyn ar gyfartaledd?
UK Highways are operators of the A55 between junctions 1 and 11. They manage the A5 Menai Bridge as part of the A55 DBFO contract and are therefore responsible for this section of the network and related contingency plans.
Contingency plans for the A55 Britannia Bridge fall to the North and Mid Wales Trunk Road Agent to manage. This includes a specific A55 Britannia Bridge High Winds Contingency plan. This has been in place for seven years and details can be found at A55 Britannia Bridge High Winds | Traffic Wales). This was last updated on 14 October 2022 in order to review the threshold wind speeds.