Posted: 27/06/2016 at 19:54
Hi Barnstar, I'm not sure there's that much wrong, especially as it's a mature plant. I just remove any dead or damaged leaves on mine. It's normal on evergreens of any kind to shed some foliage, and often it's simply down to weather, and/or temperatures. A bit of damage by insects, pests etc is also common, but it's unlikely to trouble a mature ivy.
Unless there are huge areas dying off, I wouldn't be too worried