As we described when we kicked off this quarters UK project to map petrol stations, recent community validation of third party (import) data has highlighted much outdated and erroneous data within OpenStreetMap :-(. For the Shell import we captured some of this and added it to a “fixme” tag. If you have not yet come across this tag then it is one in which OpenStreetMap users can flag something that looks wrong or requires additional information to improve the map.
It is possible to view petrol stations with a fixme tag by using Overpass Turbo scripts. We have done this already so all you have to do is click this link and press run. Results are visual as shown in the example below. There are approximately 130 petrol stations with a fixme tag so with some effort we should be able to review them all. Happy mapping!