Medal For The Healthy Tourist

Here is a medal for Londoners seeking to escape the grime of the city back before the age of the air conditioner. To accompany the health-minded tourist on their summer sojourn to cottages in better climes, this medal warns of how far one must walk back should one spend all their gelt on fun and not train fare. Does anyone know more about the bathing circuit of Victorian London? What other tokens or medals go in the series?