P123 ORACLE 123 Sun17 Oct ITV 2211:11 NETWORK   ON   REVIEW BY ALAN FRANK Sunday 17th October at 7.15pm HANOVER STREET (1979) Harrison Ford, Lesley-Anne Down Smooth, bitter-sweet mixture of adult- ery and adventure set in London in 1943 where American bomber pilot Ford and married nurse Down start an affair.Half way, the film briskly changes gear from a BRIEF ENCOUNTER type romance to an all out WW2 action movie as Ford saves the life of British agent Christopher Plummer in German-occupied France - and of course,Plummer is Down's husband... Writer-director Peter Hyams effectively integrates the two strands and there is an attractive performance by Ford in a slick and hugely enjoyable picture.  Laurence Olivier - A Life...120