No one can write and proofread the English language in quite the way that a UK native speaker can themselves. That’s a fact and it goes for any other language too.
Let’s be honest, the English language can be a nightmare! There are grammatical rules – but even these don’t always apply. Add to this that English has one of the largest vocabularies of all languages, pronunciation isn’t always obvious (think about the words knight and night, for example – just one instance of two words spelt different but sounding the same) and the fact that we have regional slang and colloquialisms and it’s no wonder that mistakes get made.
If you would like the guarantee of spelling, grammar and terminology being correct that comes from outsourcing to a copywriter in England, please contact me.