The death of Dean Whitehead in 1551 had enabled the ultra-Protestant Robert Horne to be appointed to the Deanery, but only one conservative prebendary had died and been replaced during the reign, so Horne had very little support in the Chapter and could achieve only the most superficial conformity, even at the cost of making himself very unpopular.

Horne fled, lamenting the failure of his hopes [...][9]In exile, he was at Zurich, Frankfurt and Strasburg.

[10] With Thomas Beccon, John Jewel and Edwin Sandys, he was one of the commissioners of 1559, enforcing the Injunctions of Elizabeth I of England from July of that year.

[11] In controversy with John Feckenham, he wrote in 1566 on the issues of medieval church and state relations.

He was then attacked by Thomas Stapleton, for his reliance on the history of the Papacy to be found in Bartolomeo Platina.