WITH regard to the calls for the Health Secretary to stand down (“Pressure on Robison to resign over NHS failures", The Herald, April 20), I am reminded of my recent visit to a favourite restaurant. The head waiter commented that business had declined and he indicated that restaurants have a shelf life.

Ditto politicians and political parties; the Health Secretary’s shelf life has expired and the SNP’s shelf-life will expire soon.

William Durward,

20 South Erskine Park, Bearsden.