On the back of his success in Northern Ireland, Mason was one of five people who might have become Controller of BBC Radio 4 in 1976 along with
Monica Sims and
David Hatch, both of whom were appointed some years later. In 1976, however, the post was given to
Ian McIntyre, whose strict journalistic regime lasted only two years before he was moved to become Controller of
Radio 3. In the meantime, Mason was invited back to London to take up the post of Head of Radio Drama on the impending departure of Martin Esslin, and became the third longest-serving head of one of the most culturally significant posts of the time. His entanglements with Ian McIntyre, however, were to last the rest of his time in radio. One of the reasons for bringing Mason back to Radio Drama, above his proven success in the form, was the need for a politically savvy executive who could fight the corner for Radio Drama at one of the cyclical period of BBC cuts in funding. He did this with considerable success, and was held up as a model by European broadcasters also facing contractions in the relatively expensive form of radio art. Not everything was considered a success by Mason. In 1980, Radio Drama's most popular programme, the
Radio Two daily soap, ''
Waggoner's Walk'' (on air since 1969), was presented as a potential cut since its budget was almost exactly the requested savings. Although Mason also presented a fully costed alternative series of cuts across the drama output, BBC management opted for the simple expedient of axing the soap. Meanwhile, Ian McIntyre's reign at Radio 3, with limited journalism in the musical output, saw McIntyre's intensive scrutiny of the spoken-word programmes. Drama became a particular target. When McIntyre blocked the broadcast of a Mason-commissioned radio drama by the writer and director
Mike Leigh in May, 1979,
Too Much of a Good Thing, recorded on location with convincing sexual activity, it set up a continuing conflict. Piers Plowright, in the book
And Now on Radio 4 by Simon Elmes, recalled the occasion when Mason's fury at a Radio 3 meeting, in response to criticism of a radio play, led to Mason throwing a chair and leaving the meeting. Mike Leigh's play was not broadcast until 1992 some years after the departures of both Mason and McIntyre from their posts, Mason continued to support his writers and his personal intervention in defending a
Howard Barker script,
Scenes from an Execution, which meant a line-by-line scrutiny of the play with negotiations that went down to the use of the word "groin". Richard Wortley's production, broadcast on Radio 3, features
Glenda Jackson in the leading role. Despite his reservations, McIntyre nominated the production for Europe's grand prize for radio drama, the
Prix Italia, which it won in 1985. Mason's service on committees from the EBU, the
Arts Council of Northern Ireland and the
National Council for Drama Training was influential and rigorous. At the NCDT his support for removing the accreditation of a leading London drama college in the 1980s had positive effects for the NCDT, which was shown to be far from toothless, and for the college in question which improved impressively. His concern for drama training reflected his continuing support for BBC Radio Drama's annual award of contracts to graduating drama college students competing in the
Carleton Hobbs Awards, named after one of British radio's most successful radio actors. The tenacity of Mason's tenure secured radio drama as a key component in the corporation's public service commitments. His interventions preserved the bulk of the radio drama output, and its continuing integration with radio features, which, particularly in the work of Piers Plowright, brought European recognition to the department in several Prix Italia awards. ==Later life==