Here is a reply from Co-pilot
Your landlord is almost certainly wrong to dismiss this as “your problem”. The pattern you describe - 14 slugs over five months, always in the same area, appearing at night, in a property where the laminate was already installed - strongly suggests an entry point or structural defect, and UK housing law is very clear that this falls under the landlord’s responsibility.
A recurring slug ingress caused by gaps, damp, or structural defects is a landlord responsibility, not a tenant one. This is supported by multiple authoritative sources:
Under Section 11 of the Landlord and Tenant Act 1985, landlords must keep the structure and exterior in repair. If pests enter through defects, the landlord must fix the defect and treat the infestation.
Under the Homes (Fitness for Human Habitation) Act 2018, landlords must provide a home free from infestations and fit for habitation. A serious pest issue can make a home legally “unfit”.
If the slug problem existed before you moved in or is caused by disrepair, the landlord is likely responsible.
The Housing Ombudsman expects landlords to investigate pest reports, carry out timely inspections, and not place the onus on the resident until they have established the cause. , If the slugs are entering through a physical gap, the landlord must seal it
Write to the LL saying you are raising a formal complaint which if not dealt with will be referred to the Housing Ombudsman.