Delightfully, the theme music played by Ulster Television (ITv's local franchise in Northern Ireland) from the early 1970s to the early 1980s (ie most of the time I can remember watching the channel) is also by Wayne Hill (in some accounts co-credited with Earl Ward), a tune called "The Antrim Road". Comments on this Youtube rendering describe it as much the best of the old ITA idents; I'm not going to put in the research time myself to form a judgement on that.
My one source tells me that Wayne Hill also wrote the theme to a forgotten ATV series called The Power Game, which has now become the anthem for Middlesbrough Football Club, as played by the Cyril Stapleton Orchestra:
Apart from that, there's very little else online: two tracks from the Jumping Jewels' LP Guitars About Town. And I have found nothing biographical about him, except that in the 25 March 1967 issue of Billboard he is referred to as "the late Wayne Hill". So, this man who composed two of the iconic tunes of my childhood died before I was born. Let's raise a glass to his memory.