A company I work for has open a new premises and I have just found paperwork for this premises with my name as company director, home address etc. Would I have not had to sign a contract or something to do this, they have used my details without me knowing, becoming a company director surely I would of had to sign legal documents etc. What do you guys think? The company is a private limited company
Yes - that sounds very wrong. You can start by looking at https://www.gov.uk/get-information-about-a-company for information about the company. Being a company director is a very significant responsibility and it looks very odd that they would be passing you off as a director without your knowledge.
It appears that you can pay £4 a month plus £1 per item to see filings at Companies House. So if your initial search shows you as a registered director (free search) you can then go on to pay and see the forms for your 'appointment'.
No you wouldn't have to sign a form to be appointed, as it can be done online. They should have provided two of a selection of your details eg: eye colour, mothers maiden name etc, but companies house don't verify this., so it could have been made up information.
You can register with companies house and purchase a copy of the appointment form (AP01), it's £1 and you can see whether it was done electronically with false information, or hard copy with forged signature.
However, you may not have actually been formally appointed - you will find this out via companies house.