Also I didn't catch them opening for Seal's tour last year but Horn did take The Buggles on tour finally after over 40 years -
(Horn produced Seal's first two albums among others.)
I read a book on 80's music a few years ago and Horn really help define what style of music came out and how it was produced.
Yes, Frankie Goes to Hollywood, Do they know it is Christmas(he produced it with Midge Ure) and others. Producers in the UK said what he did in the studio caused them to change how they did things to make the sound of the 80's