Shy
Your 'N' had a faulty trim release system then. This would have been due to trim release power defect, trim release switch / wiring defect etc.
No, it was de-modded by removing all the stab equipment to reduce the weight for police role equipment. We flew it for four years as a floppy stick-er. Our "loaner" aircraft had stick trim as per the original specification. It was interesting to fly, especially at night or in poor visibility.