I am starting a catering business, do I need a resale license, and how soon?

Starting up – Your first steps to running a
catering business

For sample plans go to - http://www.bplans.com/business_plan_search/?search=catering+business

In addition you will find a booklet with the link below is for people setting up a restaurant,
café or other catering business, whether you
are taking over a business that already exists
or starting a new one.

It is very important to get things right at the
start, because this will make it much easier
for you to run your business well in the future.
This booklet tells you about the main things
you need to consider.

It can be found at https://docs.google.com/viewer?url=http://www.food.gov.uk/multimedia/pdfs/startingup.pdf&pli=1