"We were of opinion that the officer did have reasonable grounds for his suspicion that an arrestable offence had been committed at Friar's Close, based on information that he had received that (based on the ECHR definition of 'reasonable suspicion') the officer did not have to be satisfied at that stage that all elements of the arrestable offence could be proved, that therefore the arrest was lawful and that consequently he was acting in the execution of his duty. We therefore held that the defendant had a case to answer."
"Did the failure of PC Pickthall to satisfy himself that the threats with the hammer had occurred in a public place render the subsequent arrest of the defendant unlawful so that the officers could not be said to be acting in the execution of their duty when seeking to arrest the defendant?"
"Constable Sneller may well have suspected that there had been an assault on the first constable in the execution of that constable's duty. That is an offence undersection 51 of the Police Act 1964 . The maximum penalty for conviction on that offence is now six months' imprisonment, so reasonable suspicion of the commission of that offence would not give grounds for summary arrest. Whether Constable Sneller appreciated this, we do not know since there is no finding. So far as we know he was never asked. I have some doubt on the point having regard to the grounds given by Constable Sneller when he arrested the defendant. It is true that by that stage Constable Sneller had suffered injury and so had grounds of arrest for assault occasioning actual bodily harm, but it is not clear from what he said that he regarded the injury as justifying the arrest. Be that as it may, reasonable suspicion of a section 51 offence against the first constable would not have provided grounds for arresting Mr Chapman."
"We were of opinion that the officer did have reasonable grounds for his suspicion that an arrestable offence had been committed at Friars Close, based on information that he had received, that (based on the ECHR definition of 'reasonable suspicion') the officer did not have to be satisfied at that stage that all elements of the arrestable offence could be proved, that therefore the arrest was lawful and that consequently he was acting in the execution of his duty. We therefore held that the defendant had a case to answer."