What is the us 1 dollar with in UK?

As of my knowledge cutoff in September 2021, the exchange rate between the US dollar (USD) and the British pound (GBP) is approximately:

1 USD ≈ 0.75 GBP

This means that one US dollar is worth approximately 0.75 British pounds. However, currency exchange rates can fluctuate over time, so it is always best to check the most up-to-date exchange rate when making a conversion.