[6] In 1970 he appeared for the Ministry of Defence at a public inquiry over plans to move its experimental range from Shoeburyness in Essex to Pembrey, near Carmarthen.

He contested the Liberal Party leadership election of 1967, but withdrew in favour of Jeremy Thorpe after gaining only a quarter of the votes in the first ballot.

[9] He later became solidly more pro-European telling an audience at a Welsh Political Archive lecture in the 1990s:[10] "Whereas almost without exception the Liberals of Wales were for it, I had developed doubts about that particular route to a United Europe and voted against entry.

"Hooson also wrote in a draft of his unfinished and unpublished autobiography: "I believe we need a federal Europe"[11] He introduced the Government of Wales Bill on St David's Day 1967, taking one of the first steps to the formation of the Welsh Assembly.

Hooson was vice-chairman of the North Atlantic Assembly's political committee, where he worked with Congressman John Lindsay on one of the early reports recommending détente with eastern Europe.

[13] The family home was in Llanidloes, where Lord Hooson's funeral was held in the China Street Chapel.

[14] In 1980 he chaired a consortium that bid for the Wales and West television franchise, and became a member of the ITV Advisory Council.

Lord and Lady Hooson also held the position of President of Llidiartywaen Young Farmers Club for many years.

Until his ill health, an annual occurrence was the young farmers being invited in every Christmas Eve to sing carols around the fireside.