Need advice on handling anti-social neighbours

Are there laws that prohibit anti-social behaviours?
The Civil Injunction power was introduced in March 2015 and replaced anti-social behaviour injunctions (ASBIs) and anti-social behaviour orders (ASBOs).

Are children (or anyone for that matter) allowed to make noise and play on any open space outside their homes?
yes, they can play.

Can the police help in such matters or do I have to file a case against the tenants and the landlord?
no need to go to the police station. Filling a case against the tenants or the landlord will be the further procedure, you may do a settlement with them by talking to each other.

Thank you for your response.

Would playing any games that can cause damage to my house be considered an offence?

Would stone-throwing at my house be considered an offence?

Would creation of noise by shouting and screaming just outside by house be considered an offence?

Would climbing over the boundary wall of my house be considered an offence?