In 1949, he reported on the show trial of the Hungarian communist László Rajk, who had falsely confessed to being an agent of Tito and others.

After Rajk's execution and eventual "rehabilitation" early in 1956, Fryer felt guilty about having reportd the coerced confession, and gave a letter of resignation to his editor, Johnny Campbell.

[1] In 1948, Fryer covered the arrival at Tilbury Docks in Britain of HMT Empire Windrush bringing settlers from the Caribbean.

"[7] His interests eventually led to him writing the substantial and influential book, Staying Power: The History of Black People in Britain (1984).

[8][9] This book discussed the long history of black people in Britain as well as the racist structures that were created by white British capitalists for their own economic benefit.

[2][8] Fryer was posthumously awarded the Knight's Cross of the Order of Merit of the Republic of Hungary at a reception at the Hungarian Embassy in London.

[2] On 26 June 2023, a blue plaque (organised by the Nubian Jak Community Trust) was unveiled in Fryer's honour outside a former residence of his in Highgate, London.