The rocker got a visit from Paul after his five-year marriage to ex-All Saints singer Nicole Appleton appeared to have hit the rocks.
He and Paul, 47, had a heart-to-heart at Liam’s home. After their chat, Liam went running with a rucksack full of weights strapped to his back.
The Beady Eye frontman, 40, bolted across Hampstead Heath, north London, out-pacing some fans who had jogged alongside him, and disappeared into the distance.
One witness said: “It looked like he was preparing for Nicole’s return. He might have to flee for his life then.”
Liam has been home alone since returning from a bender in Ibiza with his Beady Eye bandmates.
His trip came as American journalist Liza Ghorbani, 39, claimed he was the father of her baby daughter Gemma.
Following the bombshell revelation Nicole, 38, remained on holiday in Orlando, Florida, with their 12-year-old son Gene and other relatives.
She was also pictured without her wedding ring.
Paul recently house-sat for Liam and Nicole at the five-storey home in Hampstead while the couple were on holiday together.
Pals said he has been supporting his brother through his marriage woes.