Currently I only call UK time around 2-3am. Convenient for me and more often than not answered within less than a minute, if not straight away.

I did experience waits of 15-20 minutes or so a few months back, but that was during UK normal business hours, hence I avoid calling then.

More discussion of a general nature may be of interest.

https://www.flyertalk.com/forum/brit...center-33.html