You should pause between sentences, not words. Just be sure to enunciate clearly. Anyway, Britain has many many accents that are all very different. Perhaps you're used to the US accents from American movies, so try to watch more shows with British accents, like 007, Harry Potter, Game of Thrones, Sherlock, etc, and you'll get used to the British accents soon.

Sorry, I get the impression that you're not actually talking to a British speaker and are just using second-hand information instead. So, why not make contact with a speaker from the UK (or someone else familiar enough with UK English) and get some direct feedback?