Mrs Smalman,
I am an ex - London Driving Test Examiner - not an instructor. If you are coming back from a driving test with 1 dangerous and 2 serious faults - there is something badly wrong. Are you SURE you are actually up to driving test standard? Have you taken professional advice from a QUALIFIED driving instructor? What your husband and your goodself consider to be driving test "standard" may be very different from the reality of the situation. I suspect, from having conducted many thousands of driving tests, that if you are failing so badly with dangerous, let alone serious faults, you are not up to test standard. It's not that you are no good - just not ready for test.