I was a witness who gave evidence to the Falkirk Inquiry (Falkirk gas drilling plan poses radiation risk to Firth of Forth, News, May 4).

Rob Edwards writes that Dr Ian Fairlie "didn't present his evidence because Dart objected to inaccuracies in his submission". My understanding is that Dr Fairlie's oral evidence was not heard because of a negotiated agreement between Dart and the appellants (the Concerned Communities of Falkirk, or CCoF) over evidence.

Agreement to measure radon emissions went some way to alleviate CCoF's concerns. But the proposed discharges of radioactive fluids, and the burying of radioactive sludges in landfill, are also matters of major health concern.

Dr Geralyn McCarron

Queensland, Australia