Should I involve a small specialist ecology consultancy or a large multi-service company? There are advantages and disadvantages to both, and it depends on your requirements. Advantages of large multi-service companies include that they're “one-stop shops” and they may have multiple locations that can service your needs. Advantages of smaller companies include that they are often technical specialists, they can be quick to respond, and they have lower overheads. So, where should you go, big or small? Ultimately, the choice comes down to the project. If it's likely to be quite technical and there's a lot of natural waterways involved, you’re best to engage technical specialists, and small companies should be able to help you there.