Thank you for that, that confirms the newspaper and article but not my anticipated publication date. On my copy of the clipping someone has written date of 8-6-63 which I assume is an American style date, thus 6th August 1963. Could you check the date you found please.
Also I wonder if its easy for you to check in the same paper/same column in the dates after 6 Aug 1963 to see if that cookbook gets other mentions, by searching for Horsley or Lowestoft.