I opted to talk to an Invisalign orthodontist, as one place was doing it quite cheap and so far it has turned out quite well as I am two weeks into my first treatment.
The only problem I have is that down the right-side of my mouth, the top and bottom don't line up, apparently this is only something I'd be able to fix with thousands of pounds and years worth of dental work.... I can live with it if my top lot are fixed.
Here's a picture of as they are at the beginning of treatment and my face as a whole (they don't look too bad sometimes)


And now I have my aligners in:

They're not that noticeable I don't think.
So as of week 2:
Had to take them out one night because I was drinking with friends and I did it the night before whilst leaving them in, and they really smelled the next day, even though I was scrubbing them.
I've learned that from day 1 you must give them a brush with a bit of toothpaste to keep them clean. Even sometimes I've thought they were clean when putting them back in, few hours later when you take them out they can really smell.
Very odd in the first week, as your teeth have moved and you take them out to eat, it doesn't actually feel like you're eating with your own teeth.