These links refer to research funded by the UK Bridges Board or to publications of value to bridge practitioners:
CIRIA - Construction Industry Research and Information Association - home page
The next 3 items refer to CIRIA publications arising from research funded by UK Bridges Board:
CIRIA Report C676 - "Drystone retaining walls and their modifications: condition appraisal and remedial treatment"
CIRIA Report C664 - "Iron and steel bridges: Condition appraisal and remedial treatment"
CIRIA Report C656 - "Masonry arch bridges: Condition appraisal and remedial treatment"
TSO [The Stationery Office] online bookshop - Transport publications
The site includes:
Highways Agency - Inspection Manual for Highway Structures
Highways Agency - Design Manual for Roads and Bridges