It is in the UK - go to Companies House, either buy a defunct company name or register a new one, enter your details and some info about what the company will d

It is in the UK - go to Companies House, either buy a defunct company name or register a new one, enter your details and some info about what the company will do, pay a small fee {about £25 if you're using an existing name, a bit more otherwise), done. You'll get the basic Articles of Association, share certificates etc in the post, or just download them IIRC.