Memories of a sun-drenched summer were over as the rain arrived on the seafront venue in Portsmouth for the 396th staging of the event.
Liddell, a member of the Royal Navy AC, clocked 17:11 to win by 34 seconds from Christopher Wilson.
Teenager William Sweeney (Chelmsford AC) was third in 18:17.
Ciara Martin, in only her eighth parkrun and her first at Southsea, was the first woman home.
The Harrogate Harriers member recorded 21:28 to finish 29th, with Penolope Meeking (Vegan Runners) the next best in 22:21 (48th).
Pictures by Mike Cooter
Teenager William Sweeney (Chelmsford AC) was third in 18:17.
![Picture: Mike Cooter](https://www.portsmouth.co.uk/webimg/b25lY21zOjFmYzgwODY4LTVjOGUtNDgxZC1hMWQzLTdkNzYxN2JlZWJkMzpiOTg5ZDU3My01MzAwLTRhZGUtYTZiYi1iODE1YTdiM2ViNDc=.jpg?crop=3:2&width=640)
![Picture: Mike Cooter](https://www.portsmouth.co.uk/webimg/b25lY21zOjYyYTBkZjAwLWI1NGItNGJhZS04MjM1LTU2Zjc3YjQyMWViYjoxNTRiZWUxYi0yMjI5LTQ2NGUtOWI3My1lMWJkNTc2MmEyOWY=.jpg?crop=3:2&width=640)
![Picture: Mike Cooter](https://www.portsmouth.co.uk/webimg/b25lY21zOjRhMmQxOGRhLTJmZTctNDNiZS1iMmM4LTk0ZTMwYTMzZjEwOTphOWEwMzE1ZS0yNGVkLTRiMjYtYWJmNS0wMzJiN2Y5ODM1Mzg=.jpg?crop=3:2&width=640)