[r-t] Adjacency in Extension

[Robin Woolley]

Hi All,

An example of the working, or not, of adjacency.

We take Kent TB6 - since everyone on this list will be familiar with it.

Above the treble, adjacency means that the 3-4 (typical Kent) places 
above the treble in 1-2 must be preserved somehow. Some typical 
extensions are:

Kent TB8: 3-4 places with treble in 1-2
Twatt TB8: 3-4 and 5-6 places with the treble in 1-2 and 3-4
MeyrickTB8: 5-6 and 5-6 places with the treble in 1-2 and 3-4 - in this 
case, the adjacency has acceptably moved to treble in 3-4
Obnoxious TB8: 3-6 and 5-6 places with the treble in 1-2 and 3-4 - see 
Meyrick note - an example of a modal extension

BUT

Windsor TB8: 5-6 places with the treble in 1-2 - no adjacent places so 
not compliant.

Best wishes
Robin