The card on the left is a 50-card series titled "Modern Cars" issued by Morning Foods Ltd. in either '53 or '54 to promote Mornflake Oats. I do not see this set listed on TCDB. Here's a description of the set.
The card on the left is from a 25-card untitled series issued by Maxilin Marketing. This set is listed on TCDB here. Here's the back image as it is listed on TCDB it appears to match the card you posted.
They are two completely unrelated sets.
My two-cents is worth slightly more than a penny.
-- Chad --
