The IBC's original London offices were in Hallam Street, near the BBC's Broadcasting House, then moved to nearby 35–36 Portland Place. This was taken over by a British weapons development unit MRI(c) at the start of the war but later bombed. The BBC's Radio 1, inheritor of the audiences that Plugge's offshore successors had built until the 1967 Marine Broadcasting (Offences) Act made them illegal, later moved into the Hallam Street building. After the war IBC became a recording studio and stars including The Who, The Kinks, The Rolling Stones and Jimi Hendrix recorded there.