Above is an Meccano Aeroplane Constructor Outfit advertisement from the pages of the Meccano Magazine December 1933.

The aircraft show at the top is the Fairy Long Range Monoplane originally constructed in 1928 the picture shows the second aircraft built in 1933, this briefly held the world endurance record so it was in the news at this time an article appearing in the February 1932 Meccano Magazine. The Meccano boy appears to building the same aircraft depicted in the illustration it even shows the use of tapered wings a part that was not available in the U.K. Perhaps the advertising department liked the modern looking model, the illustration being frequently used in ads. Another anomaly is in the small illustrations the set and the top two aircraft are from the first sets issued before improvements were made. The illustration of the boy builing the aircraft was also used on the box label for conversion outfits but with a different aircraft illustration, in fact the illustration of the boy appears frequently in 1930's advertising material.

You canr read about the Fairy aircraft here