Some links for those of you interested for more info:
Time-Travel Britain
Cambridgeshire Council info about the park
Wandlebury Park website
Berries


Again, thank you Alison, I think you may be right that this is indeed Guelder Rose.

Fluffy Things



This one does indeed look like a creeping thistle, thanks again, Alison.
Roots



Note: Please feel free to use these photos as reference images, however do not use them commercially or copy them without asking first.