Defending a Pool Slip Claim

The pool defendant's evidential task

The pool operator defendant must usually demonstrate that reasonable practicable steps were taken to manage the slip risk. The strongest combinations of evidence include:

• Pre-incident periodic pendulum and Rz data showing the surround was being monitored
• Post-incident testing showing the actual condition at the time of the accident
• Documented cleaning and pool plant chemistry protocols
• Risk assessments pre-dating the incident
• Lifeguard and operations staff training records
• Sign-off documentation from any pre-handover or post-refurb testing

Pendulum and Rz data is the technical heart of this evidence base.

Pre-incident vs post-incident testing — for defendants

Pre-incident periodic data is the gold standard — it shows the surround was being managed before any specific claim arose. Post-incident testing is necessary where pre-incident data is absent, but is evidentially more vulnerable to challenge: the claimant's expert will argue that the surround has changed in the intervening period (and pool surfaces do change in service).

Where the claim has merit

Independence cuts both ways. Where the test data identifies a genuinely non-compliant surround, the defence position changes — typically toward early settlement at appropriate value rather than contested liability. Knowing this early is more useful to the defendant than having it emerge under cross-examination at trial.

The expert's independence

The expert's overriding duty under CPR Part 35 is to the court, not to the instructing party. A defendant-instructed expert who concealed or downplayed adverse findings would breach Part 35 and produce a report that collapses on cross-examination. Defending a claim with a Part 35-compliant expert means the report's defensive value is real and durable.

Multi-pool portfolio defence

For operators facing multiple pool slip claims across a portfolio over time, periodic pendulum and Rz testing across the estate provides an evidence base that is reusable across claims, demonstrating systematic risk management rather than reactive testing in response to each specific accident. Hotel groups and leisure trusts with periodic programmes routinely cite the programme itself in defence pleadings.