British citizen applying for visa in Malaysia

I think 10 days are enough for your application since the normal processing time is four working days. The basic documents you need to submit are: 1. your passport and a photocopy of its data page; 2. an application form affixed with your color passport photo taken within six months; 3. the original and photocopy of your entry permit for Malaysia; and 6. other supporting documents which vary according to your visit purpose.