You're dreaming Ray - It's not going to happen! Do you think Hollywood is short of 'ideas'? Any guy, on any street, could probably think of a 'great' idea for a movie, but one in a billion (or less) could actually have that 'idea' made into a hollywood movie.
If you are serious about this, then you need to write a full script, and if you're not capable of that, you need to hook up with somebody who is (preferably, somebody who is already in the business) and let them take the writer credits. If you don't know any screen writers, then you need to get a 'decent' agent, who could introduce you to some.
Now after you've found your agent, who is willing to hook you up with decent screenwriters, you better hope that your idea is amazing enough for these guys to actually want to invest their time into writing this...
If you get far enough to have a full script, that is ready to go, you better hope that your screenwriter, and agent, have some serious links in Hollywood, and with Disney, otherwise you have zero chance of them picking up the script and making the movie....
So lets go with the highly likely scenario that your screenwriter, and agent, in Britain, have no major links with Disney, or Hollywood in general, but can set you up with independant British film makers, and producers - The best you can hope for is a British low budget stinker, where everybody has stepped in and changed the idea into something unrecognisable.
Is your idea for an animation? If so, thats opening up a whole new can of worms...
Disney, and Hollywood, work with established writers, producers, and directors. As an outsider, with no reputation, or previous history of work, you have no chance of getting an 'idea' made - Sorry, but that's reality.
The only chance you have of, someday, making a disney movie, is by starting from the bottom - Low budget Independant movies. You have to earn your reputation over the years, make the right contacts, and maybe, just maybe, someday, somebody at Disney may listen to your idea.
Good luck Ray!