Did I not post 6 weeks ish ago about my brother and I clearing out dad's garage for mum? A LOT of old and useless nuts and bolts (whitworth, BSP, AF and such long since gone threads). The upsetting bit was we made several large sack fulls of old tools to scrap. High quality (in their day) spanners, taps, dies and so on. The sort of thing that dad had once upon a time as he was an engineer, and had kept for many years as to buy if needed would hve been prohibitively costly, but...well...thankfully we are metric everywhere these days. by all means squirrel.....but do ask yourself if you have any real likelihood of using it first.
the British Triumph uses whitworth... but seems that SAE is very close. have used more SAE on it than metric.... don't have any whitworth