In the run-up to the Holyrood elections on 5 May we will see more of such negative activity on the part of the "Scottish" unionist parties.
Perhaps it is time for them to show the voters the reality of their united aim - holding back progress towards Scottish independence - and to conclude a formal, ConDem/Labour, opposition coalition with the slogan "Keep Scotland British".
Robin MacCormick
Dalkeith Road
Edinburgh