ASDA supermarket publishes fuel prices daily for every petrol station in the UK here. Data returned is the JSON shown below, but can easily be displayed on a GeoMap visualization using the Infinity datasource with some basic parsing of the fields. One can also set the coordinates to a local area (the whole map of the UK gets pretty cluttered), change the color or size of the dot based on the petrol price, etc.
{
"site_id": "gcqfn1wd5k4j",
"brand": "Asda",
"address": "Abbey Park - North London Road, Coventry",
"postcode": "CV3 4AR",
"location": {
"latitude": 52.3914,
"longitude": -1.4868
},
"prices": {
"E10": 139.7,
"B7": 144.7
}
},
{
"site_id": "gcjw4hhp6ywh",
"brand": "Asda",
"address": "Riverside Retail Park, Aberdare",
"postcode": "CF44 0AH",
"location": {
"latitude": 51.702332,
"longitude": -3.416855
},
"prices": {
"E10": 133.7,
"B7": 142.7
}
}