It reads: “Os bydd toriad pwer, ffoniwch ni ar 105, dim ots i bwy rydych chi’n talu eich bil.”
Which translates to: “In a power cut, call us on 105, no matter who you pay your bill to.”
Mr Durnin added: “Broke: Govanhill is turning into Little London Bespoke: Govanhill is turning into Little Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch.”
Other users also saw the lighter side, with some posting their own Welsh responses, including bendegedig (fantastic), and dwi’n caru hyn (I love this).
One even claimed – and you will understand that Wales has been unable to verify this – that almost 20 years ago a post office in Aberdeen had a window display in Welsh for four years.
However, there is probably a simple solution for the accidental Celtic crossover.
And that is that Scottish Power’s 3.5m customers include thousands in north Wales.
The company also sent its best wishes in Welsh for the health of Glasgow by signing off its statement: “Iechyd da!”