If you live in the new part of Cawston, also know as the ‘Cawston Extension’, your parliamentary constituency is Kenilworth & Southam and not Rugby. It is likely your polling station will be in Dunchurch. You are still part of the Borough of Rugby and indeed, the Admirals & Cawston Ward, but unfortunately the parliamentary boundaries are different.
Conservative Councillor for Admirals and Cawston Cllr. Micheal Stokes warns, "This is causing a lot of confusion and to add to the issues, it also seems all of the postcodes are not being recognised by the checking services provided, with some showing as being in Warwick!"
If you want to see the boundaries visually, you can get more information here
https://www.ordnancesurvey.co.uk/election-maps/gb/#
For non-political details of nominations, constituencies and polling stations, you can get more detail here