Apparently not since the 1840’s: > The Chancellor may in theory deny an application, although the last time this happened was to Viscount Chelsea in 1842. In t

Apparently not since the 1840’s: > The Chancellor may in theory deny an application, although the last time this happened was to Viscount Chelsea in 1842. In the debate over expelling the fugitive James Sadleir in 1856, the Government committed to refusing any potential application he would make. From the Wikipedia article referenced above.