What type/specification would I need to pump water from a well/tank to another tanks (header) approx 300m in distance with an elevation of around 30m.

A very big one. US length almost 1000 ft. and 95 ft. elevation. Depends on volume needed and pressure. Here is 1 link

http://www.google.com/url?sa=t&rct=j...9DfCg-bSYfcEzQ