St. Paul's Cathedral

This cardboard jigsaw puzzle, which features an artistic depiction by Brian Francis of one of London's most iconic landmarks, carries the same identification number 1136 as others in this series, including that of St. David's Cathedral and I understand those of York Minster and St. Giles's, the only four titles listed on the flyer found with the St. David's example.
Thanks to Alan Sudbury for the supplied images and details.

Artist: Francis, Brian
Date: c1940's
Brand: Philmar
Material: Cardboard
Nationality: British-England
Number: M1136
Pieces: 408
Series: Famous Cathedrals
Size: 19" x 14 1/2"
Theme: Churches-Cathedrals
Title: St. Paul's Cathedral