[11] He was appointed High Commissioner to Great Britain in 1990 and nominated to the upper house of Indian Parliament, Rajya Sabha in August 1997.

[11] He wrote syndicated columns and op-eds that were published in over 80 newspapers in 14 languages[11] including the Deccan Herald (Bengaluru), The Daily Star, The Sunday Guardian,[13] The News,[14] The Statesman,[15] The Express Tribune,[16] Dawn,[17] and PrabhaSakshi.

[18] Every year since 2000, Nayar had been leading peace activists to light candles on the Independence days of Pakistan and India (14/15 August) at the Attari-Wagah India-Pakistan border near Amritsar.

Jaleel Ahmed Khan a senior Pakistani politician who migrated from India in 1947 also strongly advocated peace between the two neighboring countries.

[20] He had started a tradition of candle vigil since 1995 at Indo-Pak Wagah Border during midnight of 14–15 August for India-Pakistan Peace through celebration of Independence Day and remembering people of both sides.

In a February 2010 article in Pakistani newspaper Dawn, he alleged that the Indian anti-terrorism squad leader Hemant Karkare was murdered by Hindu right-wing activists.

[28] In July 2011 US authorities confirmed that Nayar attended many events in United States hosted by and supported by Syed Ghulam Nabi Fai, which had been funded by Pakistan ISI.

[29] Kuldip Nayar has written widely about current issues and historic persons, including Jawaharlal Nehru and Barry Manilow.