Tree preservation zone

There is a problem

1000 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: 410
name: THE BIRMINGHAM (LAND AT OXHILL ROAD/LAUREL ROAD, HANDSWORTH) TPO 1983
tree-preservation-order: undefined
TPO 410
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.936715 52.513787,-1.936731 52.513663,-1.936656 52.513087,-1.936466 52.512238,-1.935494 52.512347,-1.935527 52.512427,-1.935520 52.512465,-1.935592 52.512857,-1.935748 52.513646,-1.935757 52.513658,-1.936715 52.513787)))
point: POINT (-1.936137 52.513006)
notes: The shaded area represents those properties which fall within the outline of a Tree Preservation Order. To precisely identify trees protected by the Order, you can request a copy of the tree preservation order at the following link.
organisation
entry-date: 2025-11-30
start-date
end-date

Your dataset is missing the tree-preservation-order column.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.