If it’s not on their website I think you’d need to email and ask. Issue is even if modules are on their websites it’s always with a disclaimer that they may not offer a particular optional module every year. They’re subject to change at all unis. I believe this is because staff move around or become unavailable at certain times and obviously everyone has their own specialisms that they teach.
I’d definitely email as you might have someone here say they’re at Warwick now and take it but that’s no guarantee for future offerings.