Could some one explain US polls in the context of UK polls?

[Alcon]

By the way, an important UK/US difference:  UK polls report the sample as the total number of interviews conducted; US polls report only the total number of accepted, processed responses.

That is, in the UK, sample size includes voters who aren't registered voters (or likely voters), or refused to answer the rest of the survey for whatever reason.  Thus UK polls appear "bigger" when they are not.