For treequip,
here's an extract from a Salford council case history where trees were FELLED in contradiction to a TPO:
THE LEGAL BACKGROUND
The consequences of breach of a tree preservation order are set out in sections 206 and 210 of the Town and Country Planning Act 1990.
Section 206 provides for the replacement of trees, which have been cut down, uprooted or removed in contravention of a TPO. It is the duty of the landowner to plant another tree of an appropriate size and species at the same place as soon as he reasonably can, and the TPO will apply to the replacement tree(s) in the same way as it did to the original one(s). If it appears to the local authority that this duty has not been complied with, it may serve a notice on the landowner requiring him to replace the tree(s) within a specified period, and if the landowner fails to do so the local authority can enter the land and carry out the planting and recover the cost from the landowner.
So far as other penalties are concerned, section 210 states that anyone who, in contravention of a TPO, cuts down any tree or tops, lops or wilfully damages it in a way that is likely to destroy it, commits an offence, the penalty for which is a fine of up to £20,000 in the Magistrates Court. In the most serious cases a person may be committed for trial in the Crown Court and, if convicted, is liable to an unlimited fine.
There is also a lesser penalty for “other” breaches of a TPO – this would cover the situation where someone has not actually cut down the tree themselves, but has caused or permitted it to be cut down. In this instance the person/organisation that have given permission for the trees to be felled can be liable for a fine of up to £2,500. A prosecution for that offence needs to be commenced within 6 months from the date of the offence.
When considering any potential prosecution, the Council takes account of the Crown Prosecution Service guidelines and general advice regarding prosecutions. The Council needs to be satisfied that it is in the public interest to take proceedings, and it should be borne in mind that a prosecution does not in itself resolve the breach of planning control. This is why charges are generally brought where there has been a flagrant, deliberate act in breach of the TPO. The CPS code states that the first stage of the decision whether or not to prosecute is consideration of the evidence and what any possible defence may be, and how that is likely to affect the prosecution case. The advice of the Attorney-General was that it has never been the rule that suspected offences must automatically be the subject of prosecution.
Perhaps worthy of note, this discussion thread is based upon the question of that which is considered excessive pedantry in the application for PRUNING TPO trees. Best to keep a sense of perspective....
PS, if you can reference a case history of an arb contractor actually being prosecuted for PRUNING, I'll be impressed...