The WBBS is similar to the Breeding Bird Survey (BBS), in that sites are randomly selected and birds are recorded along a fixed transect route. Unlike the BBS though, the route is along a waterway rather than being in straight lines across a square plot. Identification of all birds both heard and seen is required but territories are not mapped.
The WBBS is run by the BTO, and funded by The Environment Agency for England and Wales and by a consortium of water utility and waterways companies
Additional WBBS observers are not currently needed in Hampshire, unless you would also be willing to carry out a Waterways Bird Survey (WBS) on the same water.