Where do the characters escape to in the novel "The Day of the Triffids"?

"The Day of the Triffids" is a 1951 post-apocalyptic novel by the English science fiction author John Wyndham. After most people in the world are blinded by an apparent meteor shower, an aggressive species of plant starts killing people. Although Wyndham had already published other novels using other pen name combinations drawn from his real name, this was the first novel published as "John Wyndham".

The narrative begins with Bill Masen in hospital, his eyes bandaged after having been splashed with triffid poison from a stinger. During his recovery he is told of an unexpected green meteor shower. The next morning, he learns that the light from the unusual display has rendered any who watched it blind. After unbandaging his eyes he finds the hospital in chaos, with staff and patients without sight.

Bill rescues a young sighted girl named Susan and they discover Josella and her friends. The group establish a self-sufficient colony in Sussex with some success but are constantly under threat from the triffids, which mass around the fenced exterior.

A colony of people had been established on the Isle of Wight. The novel ends with Bill's group on the Isle of Wight, determined one day to destroy the triffids and reclaim their world.