210 Sam and the River

First  watched  :  1975

In  truth  I  can  barely  remember  this  at  all, another  children's  crime  drama  set  in  London's Docklands  about  a  young  lad  Sam  ( Simon  West  from  Swallows  and  Amazons )  who  stumbles  on  some  diamond  smuggling. All  I  can  really  recall  is  that  a  hovercraft  was  involved  at  one  point