Hidden message?

Another piece of street art by the same local artist. This probably has a cryptic message, but I'm not sure what it is.
Any ideas?
Just love the hats!

[Phil Howcroft]

it is great art Jenny , they could be evacuation children , fleeing London in WW2

[Jenny]

@phil_howcroft I agree, but why the handfulls of £10 notes???

[Phil Howcroft]

@jenbo yes the £10 is a bit sublime ....Host families were given some money each week to help care for the children they took in. They were given 10 shillings and 6 pence for children over 10, and 8 shillings and 6 pence for children younger than 10. Evacuations were organised by the government.

[Jenny]

@phil_howcroft that's very interesting.

[Rick]

Cool capture.