Letter: What about the majority who didn't vote for Kaufman?

ALAN WATKINS ("Lord Jenkins must keep a sense of proportion", 27 September) asserts that both the Alternative Vote (AV) and Supplementary Vote (SV) systems of PR are "...usually, though not necessarily, more proportional than the present system..." This is not the case. Studies have shown that AV, had it been used at the last UK general election, would have produced an even bigger Labour majority on the same share of the overall popular vote. SV has very similar characteristics and is also unlikely to produce proportionality.

JOHN THOMSON

Charlton St Peter, Wiltshire