Ask an Property Solicitor. Get an Answer ASAP.
Thank you for that comprehensive reply. I have asked them not to play in my garden but will reiterate in stronger terms. However, I have only been in the house 3 weeks and have just ordered garden table and chairs. The table has a (safety) glass top. In theory a child could climb on it and if it breaks they could bleed out and die before anyone finds them. Should I change my choice of furniture??