I’m a native English speaker, but not from the UK. I listen to a lot of British podcasts and radio programme, and the pronunciation of “sixth” without the “x” sound seems to be very common.
To me, it sounds very grating as I can hear it immediately. Like the wag some people say “axe” for “ask”.
Can anyone shed any light as to why it’s commonplace in the UK? Is it taught there? Is it considered correct?
If you say “sikth” and then “sixth”, can you hear the difference?