Mr. Colin Ryan:

Not necessarily. I can think of a restaurant that could be defined as having takeaway food or fast food as well because one could either be sitting down or taking away.

Planning approval is decided on a case-by-case basis. The other premise is primarily as to its function. Does it have a sit-down area? Is seating included as part of the development? Is there no seating? If not, then by definition it is a take-away.