Erm, what about Microwave ovens???
"A microwave oven works by passing non-ionizing microwave radiation, usually at a frequency of 2.45 gigahertz (GHz) (a wavelength of 12.24 centimetres (4.82 in), through the food".
As I doubt if the ovens are linked to a frequency standard (mine aren't) or are crystal-controlled (I've got to whip one of mine apart 'cos of a funny sound - pictures at 11 - to discover this fascinating fact), they might stray into the WiFi band. Or just block the WiFi receiver. Probably go through the front-end like a dose of salts. That'll fuc*k the transfer rate.
Bet there are more microwave ovens in London than Bournemouth. Like, there's more yokels in B'mouth than the Smoke. Maybe.
Another fascinating nibble from Wikipedia...
"Cooking food with microwaves was discovered accidentally in the 1940s. Percy Spencer, a self-taught engineer, was building magnetrons for radar sets with the company Raytheon. He was working on an active radar set when he noticed that a peanut chocolate bar he had in his pocket started to melt."
I wonder if just the nuts in the peanut bar were the only ones affected? Again, Wikipedia "Spencer was married and had three children, James, John, and George.". Before, or after this magnificent discovery, one wonders?
Paris, 'cos she could melt my nuts.