Scottish Conservative MSP for the Highlands and Islands, Jamie Halcro Johnston, said
“Ruth made an enormous contribution to our Party and to protecting the Union.
“On her watch the Scottish Conservatives have gone from 15 to 31 MSPs, 115 councillors to 276 councillors and from 1 MP to 13 MPs.
“The Scottish Conservatives are now indisputably the main challengers to the SNP and the most effective defenders of the United Kingdom.
“We will all miss her in her role as leader of the Party and I wish her and her family the very best for the future.”