New Hotline to report trouble in Swanage Bay: lost children, first aid, marauding jet-skis, manic power boats...just call 423666. This goes to the Beach Wardens who have radio contact with police etc. But only during working hours (9.00 am - 5.00pm, 7 days a week in summer).
Otherwise Swanage Police are sometimes to be found at 422004 or
Marine Police on 01202 222 222 (ask for extension 3323)
Crimestoppers 0800 555 111
or of course 999.