The BBS started in 1994, and a report is produced every year containing population changes and other results from the scheme. Annual reports for every year back to 1994 can be downloaded here.
The State of the UK's Birds report (SUKB) draws together results from annual, periodic and one-off surveys. It aims to give an up-to-date overview of the health of bird populations in the UK and its Overseas Territories..
Reports from related schemes, or that are produced using BBS trends, can be downloaded here. These include State of Europe's Common Birds, Tracking Mammals Partnership updates, and Wider Countryside Butterfly Survey newsletters.
A list of reports and papers published using BBS data.
What we can learn from 25 years of watching gardens
Exploring the value of a complete quarter-century of weekly garden bird observations from BTO's Garden BirdWatch covering the length and breadth of the country.