Aggravation is the wrong paradigm
When a person can be prosecuted (rather than sued) for trespass is a statutory matter
For example, the Police, Crime, Sentencing and Courts Act 2022 (‘PCSAC’):
An offence will be committed under the PCSCA, if a person over the age of 18:
resides or intends to reside on land in or with a vehicle (including a caravan) without consent; and
fails to leave and/or remove their property (or re-enters the land) as soon as reasonably practicable when asked to do so; and
has caused, or is likely to cause ‘significant’:
damage to land/property/the environment;
disruption to the use of land/supply of utilities; and/or
distress via ‘offensive conduct’, such as the use of threatening words or behaviour.
This is a new law with AFAIK, no case law yet.
There are other offences in other legislation which would include civil trespass such as unlawfully being on a school or military base but they are their own offences - they aren’t trespass, even if they might informally be so called.