My neighbour came to my door earlier. Unable to get wifi in the house for "several days".
She had just spent 20 minutes talking to a VM bod on the phone, but was none the wiser.
I went in and had a look.
I suspected that they wouldn't get very good signals from the shub2 as it was placed on its side sandwiched between 2 metal boxes.
I moved it to the desk top, and all is well again.