His father, Reverend David Garro-Jones, trained for the ministry at Brecon College and served Congregational churches across Wales.

The walk from the Manse in Spittal towards Zion's Hill chapel has views across a deep gorge to Treffgarne Rocks and it is understood this is where the titled name of Lord Trefgarne originated.

This close association led Garro-Jones into standing as a candidate for National Liberals at the 1922 general election.

He was selected to contest Bethnal Green North East, where the sitting Liberal member, who also supported the Coalition Government, was retiring.

Garro-Jones was chosen as a Liberal candidate at the 1923 general election for the Unionist seat of Hackney South.