So for reference my radios are,
https://www.amazon.co.uk/gp/aw/d/B06VWNRJDY
A way to side step the problem, think I could just cut off the ear bud it comes with and attach a 3.5mm male jack? It looks like then I'd be able to hook it up to these without further faff or expense,
https://www.amazon.co.uk/Honeywell-1018953-Howard-Leight-Defender/dp/B00D3FG2SS