C92 Has he gone silly with the thorns?

The next clue was a little hard to find.

“There” Dana pointed at a patch of missing grass. This formed the shape of ‘B’. Dana and Ben dug up a box with a note “1 wheelchair.” Dana pressed their buzzers.

They trotted for a while before spotting the next clue. It was a clever one, a climber with tiny yellow green flowers was arranged in a B shape