@DressyGerbera
Yes definitely! The more authentic dishes tend to be a lot less sweet and more regional rather than the typical sweet and sour chicken and black bean beef type dishes. Just ask and they should be able to provide some suggestions.
I don't understand comments like this. All UK Chinese takeaways I've seen have done several different meals and only a minority have been sweet like sweet and sour pork or lemon chicken, so I wouldn't see this as typical 'British Chinese' food anyway..
Obviously chips may or may not be authentic, but most countries eat fried potatoes of some sort.
But most of the menu is usually chicken, pork, beef or prawns with a selection of vegetables, with rice or in noodles with garlic, ginger and sometimes chilli flavouring and are not sweet at all.
I have no idea as to whether these are authentic, I suspect not, but our city has a small 'China Town' and if you go to the restaurants there, where Chinese people go, there are menus in Chinese as well as English. But then I suspect that there are variations across China as it's a huge varied country, so describing something as 'Chinese food' probably makes as little sense as saying something is 'European'. Do you mean a roast dinner, fish and chips, calamari, paella, garlic prawns or pizza? All European, all very different.