A little digging shows that a commercial artist by the name of T. E. North lived at 190 Priory Road, Hull [1951/55] and 29 Mill Lane, Kirkella, Hull [1956/69]. Whether this is the same guy I've no idea but it seems possible. A search of death records for the period 1968-72 turned up only one vaguely possible result, one Thomas Edward North, who died in Sutton, Surrey, in 4Q 1972 (born 22 November 1909). It's a long shot at best but fits an artist we know to be active in 1939-64.
Update (26 June 2011)
I have recently heard from David Platt who adds the following in relation to T. E. North.
I collect steam train jigsaw puzzles as a hobby and currently own around 400 different examples. T. E. North was a prolific railway/transport artist during teh mid 20th century and his poster/illustrative style artwork was ideal for jigsaw puzzles. Manufacturers included Victory, Ian Allen/Ponda, Valentines, Philmar (all wood) and Good Companion/Tower Press (cardboard). I wrote a book on the subject of steam trains and jigsaw puzzles three yearsa ago but always found [North] difficult to research. One snippet I can add to your own research is that a man named Thomas Edward North died in Castle Hill Hospital in Cottingham - 16 April 1985 (born 25 September 1916). Cottingham, of course, is close to Hull, where we suspect he worked from. It may help others keep to research the life of this very interesting and excellent artist.The picture appears below.
__If of interest I have appended a fine example of his work for Scottish company Valentines.
Airways. London & Glasgow, Blackie & Son, 1939.
By Train and Ship. London & Glasgow, Blackie & Son, 1939.
The Boys' Book of Locomotives. London & Glasgow, Blackie & Son, 1954.
The Boys' Book of Modern Motor Cars. London & Glasgow, Blackie & Son, 1954.
The Boys' Book of Ships. London & Glasgow, Blackie & Son, 1954.
My Book of Ships. London, Collins, 195?
My Book of Trains. London, Collins, 195?
Timothy's Book of Aircraft. London & Glasgow, Collins, 1960.
Timothy's Book of Ships. London & Glasgow, Collins, 1960.
Timothy's Book of Trains. London & Glasgow, Collins, 1960.
Tiny Tots Picture Book, illus. with Leslie Branton. London & Glasgow, Blackie & Son, 1939.
Timothy's Space Book by Maurice Allward. London & Glasgow, Collins, 1961.
Do You Know About Aircraft? by Maurice Allward. London & Glasgow, Collins, 1962.
Do You Know About Cars? by Maurice Allward. London & Glasgow, Collins, 1963.
Timothy's Book of Farming by David Stephen, illus. with A. E. Kennedy. London & Glasgow, Collins, 1963.
Do You Know About Railways? by William Porter. London & Glasgow, Collins, 1964.
(* Images from around the net: the header is the frontis from an edition of Collins' Boy's Annual found at the Motoring Art Information website; Timothy's Space Book came from the Dreams of Space website, which has further illustrations from the book; and The Wonder Book of Motors is from the Old Classic Car website, which has one or two more examples of North's covers. With thanks to David Platt for additional information (see update))