Both the Buccaneer and the UK Tornado GR1 COULD carry 2 x WE177 , Bucc internally and GR1 on the under fuselage shoulder pylons, but not all planned missions required them to. Some GR 1 missions required 1 x WE177 and a fuel tank on the other shoulder pylon.
A Tornado loaded with 4 ( which By the way is not true) would barely have the range to reach the enemy .