Virgin Media published the warning alongside a series of tips for boosting the signal to the garden and creating a mobile hotspot for when the wifi can’t stretch far enough.
Thousands of customers took to Twitter to raise the issue on Thursday, with some saying they could no longer afford to pay for their Christmas food shopping.
The £50million offer from Mike Ashley’s Frasers Group – which runs Sports Direct and House of Fraser – is likely to be offered to Philip Green’s Arcadia Group in the form of a secured loan.
Students and teachers warned ‘do not come to campus’