How can I speak tomorrow?

How do you say tomorrow in British?

Is the H silent in white?

In my region we don’t say “hwite”. instead the “h” is completely silent. We say, “wite” and the “w” is exactly the same as the “w” sound in “wife”. However, I have heard quite a few people (maybe they were from the Southeastern US) pronounce the “wh” sound as though it were written “hw”.

Is the T silent in exactly?

In practice, yes it is virtually silent unless one makes a special effort to pronounce it. When we have a consonant cluster here /ktl/ one sound is often not heard. The linguistice term for it is “dissimilation”.