$ y8 z# G. K3 q% c 7 m/ {9 c4 d- }+ m$ ]' F106-year-old says resisting romance made her stronger . S. k3 c7 v$ u% ]& j0 G' kIsabella Blyth has revealed that the secret to her long life is not an aversion to alcohol or fatty foods - it is down to the fact that she has never been romantically involved with anybody.