On 12/05/2021 17:31, JohnP wrote:
A month or so ago I posted a question about a tube that I had seen at the
bottom of telegraph posts. I realied they were on new posts.

I found out today that the tube is to allow BT to put a probe down to
ensure that the contractors had made the hole to the correct depth and
hadn't trimmed a bit off the bottom of the post if boring the hole was
difficult.

Well of all the things!

Bill