Hi there

I am replacing the carpet on the stairs of my victorian terraced house with
a runner. This will leave a margin of about 6 inches on either side where
the 'naked' steps are visible.

Unfortunately on three of the steps, the riser has slipped down from thne
tread about half an inch on the right hand side. I'm not sure how to go
about filling the gap. Ideally I'd like to insert a wedge of wood but it
would have to be very long and thin so instead I was toying with the idea of
just filling the gap with flexible polyfilla and inserting one screw to
provide some stability.

What do you think? Is there any other way to tackle this?

Stephen