I will add more as I come across them, but anyone else can feel free to add British locks to this thread!
I know Yale is a multi-national company, but this one was made by Yale UK. It has to be at least 50 years old and is still in use. A little unusual as it has a side attachment for permanently attaching a chain to it.

This second one is probably around the same age and is also still in use. It is made by "Era" who are perhaps best known now for their mortice (lever) door locks. It is made like an "Old English" padlock, but doesn't have the usual "hourglass" figure.

If you are wondering what the "Old English" style normally looks like, this is one of those very tradional designs. This one is in brass and was primally a domestic padlock, the more industrial versions were typically made by Belfry. This lock is not in use and is part of my own personal collection.

It's outline is usually described as "hourglass", but it looks remarkably like Mickey Mouse as well...