I am under the impression that the firm was known as the Tonard Brazing Co. and they were/are based at 29 Leslie Park Road - Croydon - Surrey, I had a 1960's Keniston of Romford frame that was built by Tonard's and the build quality was excellent.....standard 1960's lightweight fare, Reynolds double butted / Prugnat / fastback stays etc hope this to be of help regards Griff King-Spooner (London UK)