For those who don't even know what Little People was, (though I'm pretty sure most of you remember it lol) aside from the name of the toys by Fisher-Price, it was also made into a series of videos (originally released on VHS, but later on DVD alongside VHS sometime in the early 2000s) that lasted from 1999 to sometime in the late 2000s. They were originally made by Egmont Imagination, but were later made by Wreckless Abandon Studios sometime around 2003-2004.
Anyways, back to Play Family. Not sure if it was either dubbed with British voice actors, or retained the American/Canadian voice actors. (Though, I'm probably leaning more towards the former)
The theme song might've obviously changed to replace lyrics that have "Little People" in it ('We're Little People with great big plans' as an example) to Play Family.