Hi

I realise this will make me seem a bit daft, but I'm stuck.

We bought a pup a couple of years ago and, true to form, it chewed
everything in sight, and I'm only now able to put things right again.
the problem is that I need to replace our bannister - except that I
don't know what the parts are called. It isn't a handrail with
uprights (spindles?), it's 3 planks of wood set diagonally down the
angle of the stairs and at the edge of the upstairs landing.

Does this make sense? If so, I'd appreciate knowing what they're
called and if they are available in standard lengths in diy stores.

Thansk

Steve