Example Map

library(leaflet)
library(rgdal)

post.areas <- readOGR(dsn="Distribution", layer="Areas")

## OGR data source with driver: ESRI Shapefile 
## Source: "Distribution", layer: "Areas"
## with 124 features
## It has 1 fields

m <- leaflet(post.areas) %>% setView(lng = -5, lat = 55, zoom = 5) %>% addPolygons(weight = 0.5, fillOpacity = 0.2, smoothFactor = 0.5)

m %>% addProviderTiles("CartoDB.Positron")