A FORMER BA captain caught weaving up the M9 has dropped a court bid to prove contamination of cabin air was responsible for his high blood-alcohol count.

Kenneth Walker, who has now set himself up as a management consultant, admitted it was light ale that caused him to fail a breath test.

Stirling Sheriff Court was told Walker, 47, was stopped at 4.30pm on December 3 in the first week of a pre-Christmas crackdown on drink-driving.

He gave a reading of 99 microgrammes of alcohol per 100 millilitres, nearly three times the legal limit of 35.

Walker, of Bridge of Allan, originally claimed he had been exposed to fumes "in his professional capacity" which might have affected his alcohol absorption.

However solicitor Virgil Crawford, for Walker, has now told the court his client will no longer be pursuing the line.

Mr Crawford said: "He has investigated certain matters and on the basis of recent discussions he is now pleading guilty."

Walker was fined £500 and banned from driving for 20 months.