I found this listing in the 'Manchester Evening News' dated 24th May 1954:
“SHANNON'S RADIO LTD. 25-27 Station Road, Urmston. Tel: URM 2339.”
... and this piece in the 30th September 1987 edition: “Sight and Sound expansion plan - EDWIN P. Lees, the Bolton-based electrical goods group, is expanding its Sight and Sound chain of audio, TV and video centres. It has acquired SHANNON'S RADIO of Urmston and is planning to convert the existing Lees outlet in Stockport into the fourth store in the chain. The others are at Hale and Altrincham.”
“SHANNON'S RADIO LTD. 25-27 Station Road, Urmston. Tel: URM 2339.”
... and this piece in the 30th September 1987 edition: “Sight and Sound expansion plan - EDWIN P. Lees, the Bolton-based electrical goods group, is expanding its Sight and Sound chain of audio, TV and video centres. It has acquired SHANNON'S RADIO of Urmston and is planning to convert the existing Lees outlet in Stockport into the fourth store in the chain. The others are at Hale and Altrincham.”