If you’re looking for several different services, you'll need to submit a separate request for each new category (e.g. a request for a food van and a request for a marquee). It should only take a few moments to submit each request, and if it’s for the same event, you can simply copy and paste any relevant text for the additional information field.
If, however, you’re looking for multiple suppliers within the same category (e.g. five different food vans), you only need to submit one request and can select as many suppliers from your quotes as you need.