It's definitely 30% for AIM regarding takeovers. I'm not sure whether the British or Australian law would apply in this case. RRS is an Australian company but if the shares are being bought on the AIM I'm not sure whether Aussie law applies in this case.
There's plenty of ways to get round it of course (i.e. let's say if we had 2 seperate accumulators building up positions of 19% each. That's 38% of the company, but we wouldn't get a holdings RNS because it's 2 seperate entitites).
RRS Price at posting:
38.0¢ Sentiment: Buy Disclosure: Held