This page should establish the company’s geographic relevance without creating dozens of thin location pages at launch.
Recommended structure:
Initially, I would give Essex the greatest prominence because the business is based in Witham. Suffolk and Cambridgeshire can still be presented as active service regions, but the wording should not imply blanket coverage if routes are still being established.
Individual town landing pages can be added later when there is enough operational coverage and genuine local content.