If you use the internal London Business School catering, you will not have to submit an invoice using the standard payment process.
The Club Treasurer will have to approve the catering quote and provide a Finance Code to the catering department (they will prompt for this).
If you do not yet have the Finance Code you can provide them with a screenshot of the Finance Code form.
The money will automatically be deducted from your club account using the Finance Code provided to catering.
Please use the standard payment process as you would for any other suppliers, including external catering. The "Pay Supplier" form can be found on the Club Treasury Portal.