The interview can be found here (hat-tip to Terry).
It features a great reproduction of the famous photo of Len showing Michael Caine as Harry Palmer how to make an omelette in a production still from The Ipcress File. Many of the anecdotes are familiar but there's plenty new in the article of interest to readers, such as the fact Len kept terrapins in his airing cupboard (!).
Here's an extract from the article by Robin Stummer:
'In the film, as Harry nonchalantly cracks eggs into a bowl with one hand while the woman pours out two large whiskies, you can see a cluster of newspaper cuttings pinned up near the copper pans and string of garlic. They are from the Observer’s food section. Not words, but drawings – like prison-cell treasure maps dotted with arrows, numbers and scraps of staccato text veering, slightly insanely, into bold and italic. Those cuttings are some of Deighton’s famous “cookstrips”'.