I created a Map with Geocoded Addresses from the UK. The Basis for the map is a UK districts shape-file, this constitutes my main layer. After Geocoding (via .cvs) 3 Addresses I have a new layer with the three Address-Points.
The goal is now to create a Buffer around the Address Point that spans or fills out the entire area of the postcode to which that Address belongs
In the picture I included an example with a normal Buffer (just a circle with radius = x) the goal would be to fill the whole postal area with the Buffer.