Chris Denning is the 13th person to have been arrested under Operation Yewtree - the investigation sparked by the Jimmy Savile scandal.
The investigation is being run in three strands and the allegations against Denning fall into the category that does not involve Savile.
Mr Denning was part of the original DJ line-up when the BBC launched Radio One in 1967. He had previously worked as a BBC2 announcer.
More top news
Larger stores could be allowed to open beyond the current six-hour limit on Sundays under a relaxation of rules in Wednesday's Budget.
IS is now attracting women and whole families as well as young men - but will any return to carry out another 7/7?
Rain will be heavy across Scotland, parts of northern England and Wales tonight - rumbles of thunder are possible waking some of us up.