If you are unfortunate and fail your Operational Evaluation first time round you will get 1 other attempt to take your OE. There is a £100 +VAT re-booking fee should you fail your Operational Evaluation.
If you don't pass your Operational Evaluation first time, learn from the experience and take in all the advice from your examiner.
Re-watch the Manoeuvres video, go out and practice with your drone, read your Operations Manual (if you have one at this stage) and practice planning Flight Operations.
If you should fail your flight test on the second attempt we will not be able to issue you with a General Visual Line of Sight Certificate. You will not receive a refund for your course.