IIRC at Scampton and Waddo we 'lost' our customs officer and found instead we were going to be cleared by the local excise officer instead. Oh sh1t we thought, he won't have any idea what the form is.
No, he didn't, bl00dy brilliant he was. As long as you played by the rules he applied the rules sensibly. Mind you, that may be where it all went t1ts ^p in the House. Rules being applied sensibly then someone starts to bend them, then only fair that someone else can bend a bit more until someone eventually, in the modern vernacular, rips the ^rse out of the system.