Okay, so I live in a new build (roughly 2-3 years old). A couple of months ago, there was a beeping noise which would sound every few seconds for abou ...

@ProjectPete Brilliant, thank you!

Thanks @Stuardo and @ProjectPete !! That's incredibly helpful! I had a look - the post is about 12cm think, with the rail about 5cm. Would a 8.5cm scr ...