Letters: Ulster's peril

Sir: A quantum represents the smallest possible change of state, hence your editorial headline on Saturday is regrettably true: "A quantum leap has taken place in Northern Ireland".

ALAN PARR

Tring, Hertfordshire

Sir: The elderly and lively lady who taught me geography in the 1930s was heard to say: "I often wish I could sit on the Alps and put one hand on Ireland and the other on the Balkans and push them both under the sea." Little seems to change.

JOYCE SKINNER

Lincoln