Increase Google ranking to page 1

Hi,

Our website https://www.airpressuretests.co.uk/ ranks on the first page of Google for a number of search terms, however I would like to ensure we are on page one for the following terms:

Air Pressure Test
Air Pressure Testing

At present our localised pages do appear on the first page, so for example if you were to search 'air pressure test Birmingham' we are #1 on the natural listing with the following page.

https://www.airpressuretests.co.uk/air-pressure-testing-birmingham-west-midlands/

So the project is to achieve a first page ranking for our home page for the two terms:

Air Pressure Test
Air Pressure Testing

The website is built in wordpress.

Thanks

Andy