I'm not sure about the British monarch group. Even if we take it as read that you meant in Britain, there are plenty of medals that don't have a picture of the British monarch on them.

Medal is a poor clue for that group
Card & Shirt are poor clues for that group
Major is a poor clue for the final group
The 4th Group I have no problem with but its basically impossible

I disagree it's impossible but some of your links are a little stretched or imperfect. More detailed explanations would be nice.

not bad, but the medal group.... could be just stuff that people collect

Didn't find it as bad as the others seem to have. 7/10. I strangely got the monarch's head straight away. And the trees were very obvious. Found the T connection at the end but had to mix and match a bit. Didn't have a clue about the Skywalker group and frankly still don't .If someone could explain?

Matthew mark luke and John. But did not take New testament.

Thanks for setting. There were some really nice ideas here which for me outweighs the critiicism below....but the Golf group I thought in particular overstretched.

"They all contain images of the British monarch"... you'll find it hard to believe, but there are people from outside the UK doing these puzzles too (who have different coins, banknotes, stamps, and medals)

Go and mark someone elses homework, this is supposed to be a game!!!