UPDATE@19:52BST. The feed is now re-established and stable with a good margin.

UPDATE@10:20BST. The feed is now live from the OB. This is a STEREO broadcast. The Test loop is now broadcasting.

The Test period ahead of tonight’s broadcast is from 10:25 – 11:25BST. The feed is carried on IS-1002. All usual Helpline facilities are available.