I need an icon for the main launch icon for an Android mobile app. The app is a guidebook for people to find gluten-free food in London (UK).
Local knowledge is key to this app, so I'd like to see something in the icon that's distinctively London-related: it could be a map, the skyline, a landmark building, a black taxi, or something else you think will work well.
The other key theme is food, specifically gluten-free, which can be represented with a grain symbol crossed out, though be careful to avoid copying the crossed grain symbol trademarked by Coeliac UK (google "Crossed grain" to see this). Alternatively, the icon could represent some generic food item (e.g. a pizza), or be left off entirely if necessary to avoid the icon looking busy.
Ideally the icon should be able to scale well to lower resolutions for lower-spec devices, or have a simplified version of the icon with fewer elements that can be scaled down.