What's the best way to fill this gap so it can be decorated to match the skirting? Anything easier than cutting some wood to fit and using caulk/wood filler over the smaller gaps left?
If the gap isn't just localised to this area it's new skirting time, surely? It looks like it's been filled with caulk or something on the other face, and the photo seems to show the gap being present elsewhere.
You could also tack on another moulding to cover it but that's a bit gash.
What's the best way to fill this gap so it can be decorated to match the skirting? Anything easier than cutting some wood to fit and using caulk/wood filler over the smaller gaps left?