Because "Fawlty Towers" was actually filmed at Wooburn Green, close to Beaconsfield and not actually that far from Harrow.
Thanks, I never knew that and always assumed that it was filmed at the place in Torquay on which it was based. I should have known as I have family and friends near Marlow.
Wooburn Grange or Wooburn Grange Country Club to give it it's full name, was the building used as the outside of Fawlty Towers. As with all the other outside locations used in the series it is nowhere near Torquay, it is in fact near Bourne End in Buckinghamshire.