What a RR Merlin engine sounds like and how to quickly tell the difference between a Spitfire and a Hurricane (whilst on the ground - we're still working at silhouette identification).
The best way to stack the washing up. She's forever thanking me for that!
I found this in the front garden of one of my customers.
It's a Red Legged Partridge. RSPB website has lots of useful info on British birds but I think they could add another section - how tasty roasted and the best gravy to eat it with.