TA in Scotland is A060, not A030 like England (except under London CTA where it's A060, apart from alternate Thursdays in months ending in '...er' unless you have 7 altimeters & specific JAR-OPs/CAA approved dispensation to operate.... )
Oz TA is A100, TL is F110. This gives 1000' buffer. As QNH reduces below 1013 the minimum available FL for use increases to maintain at least 1000' separation between the two systems eg min allowable FL could be F115, or F120 etc.
Very like the US system. A100 works well. The highest mountain is less than 8000' & A100 is a nice, easy to remember number.