SEALS at BLAKENEY POINT
One of Britain's largest colonies of common and grey seals is at Blakeney Pont, a 4 mile spit that sticks out into the North Sea. It is a national nature reserve, and a favourite spot for birds, native and foreign, as well as seals. Various companies run boat trips to see the seals. The trips last about an hour and tend to depart from Morston Quay.
The link below will take you to one operator - but there are others - no recommendation is implied.