Spanner the dog is a lurcher of uneven temper and adaptable morality. She has several useful superpowers including the ability to tell whether anyone in a crowded room is looking at the buffet and to teleport short distances if a Greggs bag is in sight. She runs like the wind over the fells, sleeps for days at a time and regards most of the South Lakes as her domain.
Spanner the dog and spanner the company were given their names at roughly the same time but by people who were not to meet for another three years. That the two spanners lived for a long time in the same house is entirely coincidental and no, nobody named the company after the dog.