What's the ma ehr?

I was listening to a man being interviewed today on the radio. He lives in southern England near Cambridge. Apparently, their particular use of the English language doesn't use the letter "t".

Examples:
We say: later
They say: la (silence) err

We say: skate
They say: ska (silence) ee

We say: water
They say: wah (silence) err

I guess when they recite their alphabet they say: q, r, s, (silence) u, v, and so on. Must be confusing to non-English speakers trying to learn the language.