Hello Guys I'm Thai\egyptian My Friend Of Mine Who Is Swedish Living In London Want To Send Me A Visit Visa , I Want To Know The Duration Of Visa , What Paper Should I Prepare For applying For Visa And What Your Advises , And Which Passport To Apply With Better Thanks In Advance . I Want To VISIT BIG BEN SO MUCH

Your friend cannot send you a visa you will have to apply yourself, have a read of this site it should cover anything you need to know http://www.vfs-uk-th.com/ also read the threads and come back if you have any questions specific to your circumstances.

I'm assuming you hold a Thai and Egyptian passport, as both require a visa I would suggest you apply using the passport of your country of residence.