rohan wrote:Are the 2 others Clackmannanshire and Kinross and Caithness and Bute?
Correct!
To be precise, these three pairs of small counties were unique in that they
alternated returning an MP at successive elections - they did not strictly speaking share an MP. Thus, for example, in the 1768 general election Caithness returned Kenneth Mackenzie and no member was elected for Buteshire; in the following election in 1774 James Stuart was returned for Buteshire and there was no member representing Caithness. This system came to an end with the 1832 Scottish Reform Act (the 'momentous event') better known, of course, for an extension of the franchise. Hence following this, the electoral links between Caithness and Buteshire, and between Nairnshire and Cromartyshire, were sundered. However an electoral link remained between Clackmannanshire and Kinross-shire as they thereafter united to form one parliamentary constituency.
I had some difficulty identifying the border between these latter two counties in the early nineteenth century as I originally mistakenly thought they were contiguous - but will spare you the details...
Your go...