Final answer:
Radiohead did form in Oxford, England in 1985 and they have indeed used the Ondes-Martenot, which is an electronic keyboard instrument notable for its distinct sound.
Step-by-step explanation:
It is true that the band Radiohead formed in Oxford, England in 1985. It is also correct that they have made use of the Ondes-Martenot, an early electronic keyboard instrument, in their music.
This instrument is known for its unique sound and has been used by the band to create distinctive sonic textures in some of their songs.