This allowance is automatically calculated when you enter the dates of your arrival and departure from either training or out of base hours on the Travel Subsistence form.
Business Travel Subsistence Rates are are taken from the set EU rates and will be automatically entered into the travel form. You are given subsistence for the following time periods:
Between 5 & 10 hours
More than 10 hours
This covers the cost of your meals, so you should only claim this allowance and not the actual cost of your meals. Regardless of the amount you spend, the full rate can still be claimed.
This rate can also be claimed in the future when you are working out of base or on any annual training etc.
No receipts are required to be kept for this expense.