The ADS – Archaeological Data Service is probably one of the biggest archives for excavation data in the United Kingdom. It covers most data from England, but also hosts some data from Scotland, Wales, Northern Ireland and Isle of Man. In addition, you can find some reports from Europe, Middle East, South America, Africa and Asia. It allows you to search the archives by free text or browse them sorted by time period, finds, region etc.

All data in ADS is free for access, and only requires you to accept the terms of use and access every time you download a report. You may also register for an account and get immediate access to all data.