In reply to mike123:
Work to tress - including felling - subject to a TPO can be done through the planning system subject to a “Section 211 notice” to the relevant local authority. This would be the normal route rather than removing the TPO which would be very unusual. The effect of the TPO is to require the landowner to notify the council and give their tree officer a chance to prevent the works. In my experience inviting the tree officer out and seeking their input before filing goes a long way to a hassle free process.
If there has been a grant of planning permission for a building that has TPO coverage on the land to be built on, the planning permission supersedes the TPO and the tree can be felled without a S211 notification.
I think the first thing to do is to determine what sequence of events has actually happened rather than taking what’s being said as gospel. The relevant planning portal is the first place I’d look a specifically for planning permissions and S211 notifications.
Post edited at 12:34