On Sat, 29 Sep 2007 12:22:27 +0100, Walter Briscoe
wrote:

There should have been PA within 30 secs and there should have been PA
every 2 minutes or less while the delay continued.

I've noticed in the last month or so, drivers have been much quicker
to give tannoy announcements at delays, even if it's just "we're
stopped at a red signal and I don't know why".

Updates every two minutes, however, strikes me as somewhat excessive.