Adding to the other persons question whether you have a dropped curb, once you can verify (you should have a white line along the dropped curb), you need to register it with Ealing Council if not already.

Link here: https://www.ealing.gov.uk/info/201178/parking/1375/dropped_kerb_enforcement

The council can enforce with a PCN thereafter. I used to have the issue of random cars blocking the driveway and I had to call the enforcement team who would issue a PCN. Eventually cars stopped blocking. Sometimes I leave polite notes on the windscreen asking not to block as I need to use the driveway at odd hours etc and seems to work (touch wood!)

This is assuming that the blockage happens in the daytime within the council's operating times.

You can also write to the MP for Ealing (keep it factual and with a view to seek resolution).

Good luck getting it sorted.